On Closure Operator for Interval Order Structures. - Ryszard Janicki; Nadezhda Zubkova (FCS, 2009)

Closure Operators for Order Structures. - Ryszard Janicki; Dai Tri Man Le; Nadezhda Zubkova (FCT, 2009)

Modeling Interval Order Structures with Partially Commutative Monoids. - Ryszard Janicki; Xiang Yin; Nadezhda Zubkova (CONCUR, 2012)