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Algebra and Logic > 2018 > 57 > 1 > 39-48
Fundamenta Informaticae > 2016 > Vol. 145, nr 4 > 485--509
Studia Humana > 2015 > 4 > 4 > 3-12
Fundamenta Informaticae > 2013 > Vol. 123, nr 2 > 135--142
Filozofia Nauki > 2006 > 14 > 3(55) > 21-48
Discrete Mathematics > 1998 > 184 > 1-3 > 195-203
Data & Knowledge Engineering > 1997 > 23 > 1 > 47-57
Computer Networks and ISDN Systems > 1996 > 28 > 12 > 1585-1602