Identifying 2-Monotonic Positive Boolean Functions in Polynominal Time. - Endre Boros; Peter L. Hammer; Toshihide Ibaraki; Kazuhiko Kawakami (ISA, 1991)

Polynomial-Time Recognition of 2-Monotonic Positive Boolean Functions Given by an Oracle. - Endre Boros; Peter L. Hammer; Toshihide Ibaraki; Kazuhiko Kawakami (SIAM J. Comput., 1997)