Scatter of journals and literature obsolescence reflected in document delivery requests. - Yasar Tonta; Yurdagül Ünal (J. Assoc. Inf. Sci. Technol., 2005)

Impact of Electronic Journals on Document Delivery Services. - Yasar Tonta; Yurdagül Ünal (ELPUB, 2006)

The Research Impact of Open Access Journal Articles. - Yasar Tonta; Yurdagül Ünal; Umut Al (ELPUB, 2007)

Consortial Use of Electronic Journals in Turkish Universities. - Yasar Tonta; Yurdagül Ünal (ELPUB, 2008)

An Analysis of the Consortial Use of Electronic Journals in Turkey: The Case of SpringerLink and Wiley InterScience Databases. - Yasar Tonta; Yurdagül Ünal (ELPUB, 2009)

Constituencies of Use: Representative Usage Scenarios in International Digital Library User Studies, a Case Study on Europeana. - Duncan Birrell; Milena Dobreva; Yurdagül Ünal; Pierluigi Feliciati (ELPUB, 2010)

A New Focus on End Users: Eye-Tracking Analysis for Digital Libraries. - Jonathan Sykes; Milena Dobreva; Duncan Birrell; Emma McCulloch; Ian Ruthven; Yurdagül Ünal; Pierluigi Feliciati (ECDL, 2010)

Does Urquhart's Law hold for consortial use of electronic journals? - Yasar Tonta; Yurdagül Ünal (Scientometrics, 2010)

Are Turkish universities ready for e-learning: A case of Hacettepe University Faculty of Letters. - Irem Soydal; Gülten Alir; Yurdagül Ünal (Inf. Serv. Use, 2011)

Are Turkish Universities Ready for E-learning: A case of Hacettepe University. - Irem Soydal; Yurdagül Ünal; Gülten Alir (ELPUB, 2012)

Distance education on digitization: evaluation of an application in Turkey. - Bülent Yilmaz; Özgür Külcü; Yurdagül Ünal; Tolga Çakmak (Aslib Proc., 2013)

Preparedness for Research Data Sharing: A Study of University Researchers in Three European Countries. - Gobinda Chowdhury; Joumana Boustany; Serap Kurbanoglu; Yurdagül Ünal; Geoff Walton (ICADL, 2017)

News Consumption and Sharing Behaviors of Individuals in the Post-truth Era. - Yurdagül Ünal; Ipek Sencan; Serap Kurbanoglu (ECIL, 2021)