Open access (OA) is a publication model where in neither readers nor a reader's institutions are charged for access to articles or other resources. Users are free to read, download, copy, distribute, print, search, or link to the full texts of these articles. Therefor it is the practice of providing free access via the Internet to peer-reviewed scholarly journal articles.
But, is it common for authors to cite the open access articles? And how the quality is? There are rare evidences for this question.
Therefore, the aim of this paper is to investigate the extent to which open access articles, using DOAJ database to target open access journals, had been cited by ISI Journal papers. After acquiring all the papers published in these journals during 2001-2010, their references were extracted and analyzed. We look for variations in citations by journal subject, region/country of publication, language of publication, and citation impact factor, and try to estimate the extent of acceptance of open access papers within ISI Journals.