1. The use of grey literature in health sciences: a preliminary survey;Alberani;Bulletin of the Medical Library Association,1990
2. Do open-access articles have a greater research impact?;Antelman;College and Research Libraries,2004
3. Archambault, E., & Vignola-Gagné, E. (2004). The use of bibliometrics in the social sciences and humanities. Prepared for the Social Sciences and Humanities Research Council of Canada (SSHRC). http://www.sciencemetrix.com/pdf/SM_2004_008_SSHRC_Bibliometrics_Social_Science.pdf.
4. Chapter 1;Auger,1998
5. Towards a continuum of scholarship: The eventual collapse of the distinction between grey and non-grey literature?;Banks,2006