Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Hamid R. Jamali, Majid Nabavi. Open access and sources of full-text articles in Google Scholar in different subject fields. Scientometrics, 105(3):1635-1651, 2015. [doi]
Abstract is missing.