Vikas, Narayan (3-SFR-SC): A complete and equal computational complexity classification of compaction and retraction to all graphs with at most four vertices and some general results. (English summary). - J. Comput. System Sci. 71 (2005), no. 4, 406--439Vesel, Aleksander (Avtor) 20062015-07-10 15:03:09Delo ni kategorizirano51683sl