TY  - JOUR
AU  - Schiermeyer, Ingo
TI  - Problems remaining NP-complete for sparse or dense graphs
JO  - Discussiones Mathematicae. Graph Theory
PY  - 1995
SP  - 33
EP  - 41
VL  - 15
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DMGT_1995_15_1_a3/
LA  - en
ID  - DMGT_1995_15_1_a3
ER  -