1-       The Spectroelectrochemical Determination of "Formal Potentials and n‑Values" of Some Electrochemically Formed Conducting Polyheterolene Films, David D. Cunningham, Ahmed Galal, AC.V. Pham, Edmund T. Lewis, Armin Burkhardt, Laarni Laguren‑Davidson, Asare Nkansah, O.Y. Ataman, Hans Zimmer and Harry B. Mark,Jr, J.Electrochem. Soc., 135,11, 2750‑54, (1988).

2-       Synthesis of Mixed Oligomeric Heteroarylenes Containing Furan, Thiophene, And Selenophene Rings; Their UV Spectra And Oxidation Potentials, Hans Zimmer, R. Shabana, A. Galal, and H.B. Mark,Jr., Phosphorus, Sulfur and Silicon, 42,171-176, (1989). 

3-     Synthesis of Mixed Oligomeric Heteroarylenes Containing Thiophene and Selenophene Rings; their U.V. Spectra and Oxidation Potentials, R. Shabana, A. Galal, Harry B. Mark,Jr., Hans Zimmer, Salo Gronowitz and A.B. Hornfeldt, J. Chem. Soc., Chem. Comm., 988-989, (1988). 

4-     Studies of Some Hindered 2,2"‑Bithienyl and 3,3"‑Bridged 2,2" ‑ Bithienyls with Special Reference to their UV Spectra and Oxidation Potentials, A. Amer, A. Burkhardt, A. Nakansah, R. Shabana, A. Galal, H.B. Mark,Jr. and Hans Zimmer, Phosphorus, Sulfur and Silicon, 42, 63-71, (1989).

5-     Electrochemical Synthesis of Conducting Polymers From Oligomers Containing Thiophene and Furan Rings, Ahmed Galal, Edmund T. Lewis, O.Y. Ataman, Hans Zimmer and Harry B. Mark,Jr.,  J. Poly. Sc., Poly. Chem.,27, 1891-1896, (1989).

6-     Conductivity Monitoring By An Amperometric Detector With A Cu(II) Containing Poly(3‑Methylthiophene) Electrode, Z.L.Xue, A. Ersin Karagozler,O.Y. Ataman, Ahmed Galal, A. Amer, Hans Zimmer and H.B. Mark,Jr., Electroanalysis, 2, 1-7, (1990).

7-     Electrochemical Synthesis, Characterization and Spectroelectrochemical Studies of Some Conducting Polyheteroarylenes, Ahmed Galal, D.D. Cunningham, Ali E. Karagozler, Edmund T. Lewis, Asare Nkansah, Armin Burkhardt, O.Y. Ataman,Hans Zimmer and Harry B. Mark,Jr., Proceedings of the Electrochemical Society, Vols. 90-92, 179-191, (1990).

8-     Synthesis of Mixed Oligomeric Heteroarylenes Containing Unsubstituted Furan, Thiophene, and Selenophene Rings; Their UV Spectra and Oxidation Potentials, R. Shabana, A. Galal, H.B.Mark,Jr., and Hans Zimmer, Phosphorus,Sulfur and Silicon, 48, 239-244, (1990).

9-     Voltammetric Studies of the Oxidation of Reduced Nicotinamide Adenine Dinucleotide at a Conducting Polymer‑Modified Electrode, Nada F. Atta, Ahmed Galal, Ali E. Karagozler, Hans Zimmer and Harry B. Mark,Jr., J. Chem. Soc., Chem. Commun., 19, 1347-1349, (1990).

10-     Electrochemistry and Detection of Organic and Biological Molecules at Conducting Polymer Modified Electrodes, Nada F. Atta, Ahmed Galal, Ersin A. Karagozler, Hans Zimmer and Harry B. Mark,Jr., Biosensors & Bioelectronics,  6, 333-341, (1991).

11-     A Potentiometric Iodide Sensor Based on a Conducting Poly(3‑ Methylthiophene) Polymer Film Electrode, A.E. Karagozler, O.Y. Ataman, Ahmed Galal, Zhi-Lun Xue, H. Zimmer and H. B. Mark,Jr.,  Anal. Chim. Acta, 248, 163-172, (1991).

12-     Anodic Stripping Voltammetry at Mercury "Films" Deposited on Conducting Poly(3-methylthiophene) Electrodes, Z. Wang, Ahmed Galal, H. Zimmer, and H. B. Mark,Jr., Electroanalysis, 4, 77-85, (1992).

13-     Electrochromism and Electrochemical Characterization of Soluble Poly[3‑Alkyl(hetero-arylene)s], Ahmed Galal, A. Ersin Karagozler, Rashad S. Omar, A. Amer, Hans Zimmer and Harry B. Mark,Jr.,  J. Solar Energy Materials and Solar Cells, 25, 339-348,( 1992).

14-     Electrochemistry and Detection of Some Organic and Biological Molecules at Conducting Polymer Electrodes.  II. Effect of Nature of Polymer Electrode and Substrate on Electrochemical Behavior and Detection of Some Neurotransmitters,  Ahmed Galal, Nada F. Atta, J. F. Rubinson, H. Zimmer and H. B. Mark,Jr.,  Anal. Lett., 26(7), 1361-1381, (1993).

15-     Potentiometric Selective Determination of Hydrogen Sulfide by an Electropolymerized Membrane Electrode Based on Binaphthyl-20-Crown-6, Y. Long Ma, Ahmed Galal, H. Zimmer, H. B. Mark, Jr., Z. F. Huang, and P. B. Bishop, Anal. Chim. Acta, 298, 21-26, (1994).

16-     A potentiometric Iodide (and Other) Ion Sensor Based on a Conducting Polymer Film Electrode, II. Effect of Electrode Conditioning and Regeneration Techniques, Ahmed Galal, Z. Wang, H. Zimmer, P. L. Bishop and H. B. Mark, Jr.,  Anal. Chim. Acta, 299, 145-163, (1994).

17-     The Determination of Catechols in the Presence of Ascorbic Acid and Uric Acid by Flow Injection Analyses Employing a Potentiometric Dibenzo-18-Crown-6 Electrode Detector, S. K. Lunsford, Ahmed Galal, N. Akmal, H. Zimmer, Y. L. Ma, and H. B. Mark,Jr., Anal. Lett., 27 (11), 2141-2151, (1994).

18-     Characterization and Investigation of Electrocatalytical Properties of Poly(p-phenylene) Modified Electrodes, J. F. Rubinson, S. Neff, H. B. Mark,Jr., Ahmed Galal, and Nada F. Atta., J. Electroanal. Chem., 384, 19-23, (1995).

19-     Programmable Selective Inexpensive Potentiometric Detector for Flow Injection analysis.  Potassium Determination with a Nafion Membrane Modified Electrode, N. Akmal, S.K. Lunsford, A. Galal, A. E. Karagozler, and H. B. Mark,Jr., Croat. Chemi. Acta, 68(2), 403, (1995).

20-     The Development of a Sampler-Sensor Using a Vanadium-Oxinate-Polymer Film for the Selective and Direct Determination of Atmospheric Ethanol, E. T. Hayes, A. Galal, and H. B. Mark, Jr., Talanta, 42(6), 873-877 (1995).

21-     The Electrochemistry of Neurotransmitters at Conducting Organic Polymer Electrodes: Electrocatalysis and Analytical Applications, H. B. Mark, Jr., N. F. Atta, Y. L. Ma, K. L. Petticrew, H. Zimmer, Y. Shi, S. K. Lunsford, J. F. Rubinson, and Ahmed Galal,  Bioelectrochemistry and  Bioenergetics, 38, 229-245 (1995).

22-     The Application of Various Immobilized Crown Ether at a Platinum Electrode, S. K. Lunsford, Y. L. Ma, Ahmed Galal, C. Striley, H. Zimmer and H. B. Mark, Jr., Electroanalysis, 7(5), 420-424 (1995).

23-     Poly(Binaphthyl-20-Crown-6) as Receptor Based Molecular Selective Potentiometric Electrodes for Catecholamines and 1,2-Dihydroxybenzene Derivatives, Y. Long Ma, Ahmed Galal, S. K. Lunsford, H. Zimmer, H. B. Mark, Jr., Z. F. Huang and P. B. Bishop, Biosensors and Bioelectronics, 10, 705-15, (1995).