An Experimental Study on the Reliability of COSMIC Measurement Results. - Erdir Ungan; Onur Demirörs; Özden Özcan Top; Baris Özkan 001 (IWSM/Mensura, 2009)

A Clustering Based Functional Similarity Measurement Approach. - Burak Usgurlu; Özden Özcan Top; Erdir Ungan; Onur Demirörs (EUROMICRO-SEAA, 2010)

Common Practices and Problems in Effort Data Collection in the Software Industry. - Aysegul Özkaya; Erdir Ungan; Onur Demirörs (IWSM/Mensura, 2011)

A Functional software measurement approach bridging the gap between problem and solution domains ; Problem ve çözüm uzayı arasında bağlantı sağlayan bir işlevsel büyüklük ölçüm yaklaşımı. - Erdir Ungan (2013)

Comparison of Functional Size Based Estimation and Story Points, Based on Effort Estimation Effectiveness in SCRUM Projects. - Erdir Ungan; Numan Çizmeli; Onur Demirörs (EUROMICRO-SEAA, 2014)

Scrum Uygulamalarında İşlevsel Büyüklük Tabanlı İşgücü Kestirimi ile Hikaye Puanı Tabanlı İşgücü Kestiriminin Karşılaştırılması. - Erdir Ungan; Numan Çizmeli; Onur Demirörs (UYMS, 2014)

A Functional Software Measurement Approach to Bridge the Gap Between Problem and Solution Domains. - Erdir Ungan; Onur Demirörs (IWSM/Mensura, 2015)

Using FSM patterns to size security non-functional requirements with COSMIC. - Erdir Ungan; Sylvie Trudel; Luc Poulin (IWSM-Mensura, 2017)

Automated COSMIC Measurement and Requirement Quality Improvement Through ScopeMaster® Tool. - Erdir Ungan; Colin Hammond; Alain Abran (IWSM-Mensura, 2018)

Analysis of the Gap Between Initial Estimated Size and the Final (True) Size of the Software. - Erdir Ungan; Sylvie Trudel; Alain Abran (IWSM-Mensura, 2018)