| 1991 |
| Stefanos Gritzalis, D. Gritzalis, Athens, Greece, New Technologies Pubs. (in Greek) |
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| 2000 |
| Stefanos Gritzalis, C. Douligeris, A. Vakali, G. Soultis, D. Tselios, C. Patsa, Athens, Greece, Livvanis Pubs. (in Greek) |
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| 2003 |
| Stefanos Gritzalis, S. Katsikas, D. Gritzalis, Athens, Greece, Papasotiriou Pubs. (in Greek) |
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| Stefanos Gritzalis, Constantinos Lambrinoudakis, S. Dritsas, S. Katsikas, Athens, Greece, e-Business Forum, Greek Research and Technology Network (in Greek) |
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| 2004 |
| Stefanos Gritzalis, S. Katsikas, D. Gritzalis, Athens, Greece, New Technologies Pubs. (in Greek) |
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| 2006 |
| Stefanos Gritzalis, Georgios Kambourakis, S. Katsikas, Athens, Greece, Papasotiriou Pubs. (in Greek) |
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| 2007 |
| Stefanos Gritzalis, Constantinos Lambrinoudakis, A. Acquisti, S. De Capitani di Vimercati, New York, USA, Auerbach Publications, Taylor and Francis Group |
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| 2009 |
| Stefanos Gritzalis, Charalambos Skianis, T. Karygiannis, Leicester, UK, Troubador Publishing |
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| 2010 |
| Stefanos Gritzalis, Constantinos Lambrinoudakis, Lilian Mitrou, S. Katsikas, Athens, Greece, Papasotiriou Pubs. (in Greek) |
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| 2011 |
| Stefanos Gritzalis, S. Katsikas, V. Chryssikopoulos, M. Burmester, Athens, Greece, Papasotiriou Pubs. (in Greek) |
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Greek