The Implicit General Order Complementarity Problem, models and iterative methods. - George Isac; D. Goeleven (Ann. Oper. Res., 1993)

Sovability theory for a class of hemivariational inequalities involving copositive plus matrices Applications in robotics. - D. Goeleven; Georgios E. Stavroulakis; P. D. Panagiotopoulos (Math. Program., 1996)