Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{MASLO_1987__37_2_a9, author = {Plesn{\'\i}k, J\'an}, title = {On the interchange heuristic for locating centers and medians in a graph}, journal = {Mathematica slovaca}, pages = {209--216}, publisher = {mathdoc}, volume = {37}, number = {2}, year = {1987}, mrnumber = {899438}, zbl = {0642.05030}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MASLO_1987__37_2_a9/} }
Plesník, Ján. On the interchange heuristic for locating centers and medians in a graph. Mathematica slovaca, Tome 37 (1987) no. 2, pp. 209-216. http://geodesic.mathdoc.fr/item/MASLO_1987__37_2_a9/