TY  - JOUR
AU  - Haff, C. E.
AU  - Murty, U. S. R.
AU  - Wilton, R. C.
TI  - A Note on Undirected Graphs Realizable as P.O. Sets
JO  - Canadian mathematical bulletin
PY  - 1970
SP  - 371
EP  - 374
VL  - 13
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-070-6/
DO  - 10.4153/CMB-1970-070-6
ID  - 10_4153_CMB_1970_070_6
ER  -