2024-03-28T09:34:43Zhttp://sci-gems.math.bas.bg:8080/oai/requestBulDML at IMIhttp://sci-gems.math.bas.bg:8080/oai/request2.0gsimeonov@math.bas.bg2001-01-01T00:00:00ZpersistentYYYY-MM-DDThh:mm:ssZgzipdeflateOCLC's OAICat Repository FrameworkJeffrey A. Youngjyoung@oclc.orgOCLC1.5.48http://alcme.oclc.org/oaicat/oaicat_icon.gifhttp://www.oclc.org/research/software/oai/cat.shtm