Schmid, K.; Böhmer, G. (January 1987). "Reference master: A microcomputer-based storage and retrieval system for bibliographic references". International Journal of Bio-Medical Computing. 20 (1–2): 107–121. doi:10.1016/0020-7101(87)90019-5. ISSN0020-7101. PMID3549574.
Schmid, K.; Böhmer, G. (January 1987). "Reference master: A microcomputer-based storage and retrieval system for bibliographic references". International Journal of Bio-Medical Computing. 20 (1–2): 107–121. doi:10.1016/0020-7101(87)90019-5. ISSN0020-7101. PMID3549574.
Schmid, K.; Böhmer, G. (January 1987). "Reference master: A microcomputer-based storage and retrieval system for bibliographic references". International Journal of Bio-Medical Computing. 20 (1–2): 107–121. doi:10.1016/0020-7101(87)90019-5. ISSN0020-7101. PMID3549574.