A Completeness Theorem for Extended Order Dependencies on Relational Attribute Models in Dedekind Categories. - Hitomi Okuma; Yasuo Kawahara (RelMiCS, 2001)

An overview of decision making in Rough Non-deterministic Information Analysis. - Hitomi Okuma; Michinori Nakata; Dominik Slezak; Hiroshi Sakai (NaBIC, 2010)

Properties on inclusion relations and division charts in non-deterministic information systems. - Hitomi Okuma; Michinori Nakata; Dominik Slezak; Hiroshi Sakai (GrC, 2011)

Stable rule extraction and decision making in rough non-deterministic information analysis. - Hiroshi Sakai; Hitomi Okuma; Michinori Nakata; Dominik Slezak (Int. J. Hybrid Intell. Syst., 2011)

Division charts for handling the consistency in granular computing. - Hitomi Okuma (Int. J. Reason. based Intell. Syst., 2012)