Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1994__74_1_167280, author = {V.S. Sunder and Uma Krishnan}, title = {On {Principal} {Graphs} and {Weak} {Duality.}}, journal = {Mathematica Scandinavica}, pages = {49--63}, publisher = {mathdoc}, volume = {74}, number = {1}, year = {1994}, zbl = {0809.05057}, url = {http://geodesic.mathdoc.fr/item/MS2_1994__74_1_167280/} }
V.S. Sunder; Uma Krishnan. On Principal Graphs and Weak Duality.. Mathematica Scandinavica, Tome 74 (1994) no. 1, pp. 49-63. http://geodesic.mathdoc.fr/item/MS2_1994__74_1_167280/