| #51 | Advances in data analysis and classification. -- Berlin : Springer, 2007-. -- ISSN 1862-5347 print. -- ISSN 1862-5355 online |
| #52 | Advances in differential equations. -- Athens : Khayyam Pub., 1996-. -- ISSN 1079-9389 |
| #53 | Advances in mathematics. -- Bruge : Academic Press, 1965-. -- ISSN 0001-8708 print. -- ISSN 1090-2082 online |
| #54 | Aequationes mathematicae. -- Basel : Birkhäuser, 1968-. -- ISSN 0001-9054 print. -- ISSN 1420-8903 online |
| #55 | AI communications : The european journal on artificial intelligence. -- Amsterdam : Department Social Science Informatics, 1988-. -- ISSN 0921-7126 print. -- ISSN 1875-8452 online |
| #56 | AKCE International Journal of Graphs and Combinatorics. -- Krishnankoil : Kalasalingam University, 2004-. -- ISSN 0972-8600 |
| #57 | Aktuality výpočetní techniky. -- CZECH REPUBLIC : Praha : Nakladatelství technické literatury, 1972-1991,, 1972-1991. -- ISSN 0323-1011 |
| #58 | Algebra and logic. -- New York : Consultants Bureau, 1968-. -- ISSN 0002-5232 print. -- ISSN 1573-8302 online |
| #59 | Algebra Colloquium. -- Beijing : Chinese Academy of Sciences, 1994-. -- ISSN 1005-3867 print. -- ISSN 0219-1733 online |
| #60 | Algebra i analiz. -- Leningrad : Nauka, 1989-. -- ISSN 0234-0852 |