1. Siakas, K., Georgiadou, E., Berki E.: Agile methodologies and software process improvement. Isaias, P., Baptista-Nunes, M., Palma, dos Reis A. (eds.) Proceedings of the Virtual Multi Conference on Computer Science and Information Systems (MCCSIS 2005) - Software Engineering and Applications (SEA), April 11–28. International Association for the Development of Information Society (IADIS), Portugal, pp. 412–417 (2005)
2. Siakas, K., Balstrup, B.: A field-study of cultural influences on software process improvement in a global organisation. In: Hindel, B., et al. (eds.) Proceedings of the European Software Process Improvement Conference, EuroSPI 2000, Copenhagen 7–9 November, pp. 2-20–2-31
3. Athanasiadis, C., Siakas K., Messnarz, R.: Multiplying knowledge in ISO/IEC 15504 based improvements. In: Messnarz, R., Goericke, S., Koinig, S. (eds.) Industrial Proceedings of European Software Process Improvement (EuroSPI 2007), Potsdam, Germany, 26–28 September, pp. 3.1–3.11 (2007). ISBN 978-3-98091450607
4. Siakas, K., Chatzianatasiou, P.: Capability maturity model (CMM) self-assessment used in three Greek software developing companies. In: 6th Hellenic Conference in Computing, Athens, 4–6 December, pp.747–756 (1997)
5. Korsaa, M., et al.: The SPI manifesto and the ECQA SPI manager certification scheme. J. Softw. Evol. Process 24(5), 525–540 (2012)