Characterizations of generalized monotone nonsmooth continuous maps using approximate Jacobians. Jeyakumar, V.; Luc, D.T.; Schaible, S. — 1998 Journal of Convex Analysis
Least deviation decomposition with respect to a pair of convex sets. Luc, D.T.; Martínez-Legaz, J.E.; Seeger, A. — 1999 Journal of Convex Analysis