Order:
  1.  5
    Minimal knowledge problem: A new approach.Grigori Schwarz & Mirosław Truszczyński - 1994 - Artificial Intelligence 67 (1):113-141.
  2.  6
    In search of a “true” logic of knowledge: the nonmonotonic perspective.Grigori Schwarz - 1995 - Artificial Intelligence 79 (1):39-63.
  3.  7
    On embedding default logic into Moore's autoepistemic logic.Grigori Schwarz - 1996 - Artificial Intelligence 80 (2):349-359.