Soydal, Irem, Gülten Alir, and Ünal Yurdagül. "Are Turkish Universities Ready for E-learning: A case of Hacettepe University." In Social Shaping of Digital Publishing: Exploring the interplay between Culture and Technology, 16th International Conference on Electronic Publishing. ELPUB. Guimaraes, Portugal, 2012.

Birrell, Duncan, Milena Dobreva, Ünal Yurdagül, and Pierluigi Feliciati. "Constituencies of Use: Representative Usage Scenarios in International Digital Library User Studies, a Case Study on Europeana." In Publishing in the networked world: Transforming the Nature of Communication, 14th International Conference on Electronic Publishing, 245-257. ELPUB. Helsinki, Finland, 2010.

Yurdagül, Ünal, and Yasar Tonta. "An Analysis of the Consortial Use of Electronic Journals in Turkey: The Case of SpringerLink and Wiley InterScience Databases." In Rethinking Electronic Publishing: Innovation in Communication Paradigms and Technologies - Proceedings of the 13th International Conference on Electronic Publishing, 535-542. ELPUB. Milano, Italy, 2009.

Tonta, Yasar, and Ünal Yurdagül. "Consortial use of electronic journals in Turkish universities." In Sustainability in the Age of Web 2.0 - Proceedings of the 12th International Conference on Electronic Publishing, 203-216. ELPUB. Toronto, Canada, 2008.

Tonta, Yasar, Ünal Yurdagül, and Umut Al. "The Research Impact of Open Access Journal Articles." In Openness in Digital Publishing: Awareness, Discovery and Access - Proceedings of the 11th International Conference on Electronic Publishing, 321-330. ELPUB. Vienna, Austria, 2007.

Tonta, Yasar, and Ünal Yurdagül. "Impact of Electronic Journals on Document Delivery Services." In Digital Spectrum: Integrating Technology and Culture - Supplement to the Proceedings of the 10th International Conference on Electronic Publishing, 329-338. ELPUB. Bansko, Bulgaria, 2006.