TY  - JOUR
AU  - V.S. Sunder
AU  - Uma Krishnan
TI  - On Principal Graphs and Weak Duality.
JO  - Mathematica Scandinavica
PY  - 1994
SP  - 49
EP  - 63
VL  - 74
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MS2_1994__74_1_167280/
ID  - MS2_1994__74_1_167280
ER  -