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Mathematica Pannonica
Author:
Jonathan David Farley
Independence Structures . Journal of Mathematical Analysis and Applications , 30 ( 1970 ), 1 – 31 . [15] Steffens , K . Ergebnisse aus der Transversalentheorie. II . Journal of Combinatorial Theory (A) , 20 ( 1976 ), 202 – 229 . [16] University of