Non-Monotonic Extensions of Logic Programming Second International Workshop NMELP '96, Bad Honnef, Germany September 5 - 6, 1996, Selected Papers - Dix, Juergen; Dix, Juergen; Moniz Pereira, Luis; Moniz Pereira, Luis; Przymusinski, Teodor C.; Przymusinski, Teodor C. (Springer Berlin Heidelberg : Imprint: Springer, 1997)