Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1988_300_2_a8, author = {S. V. Yushmanov}, title = {Metric properties of chordal and {Ptolemaic} graphs}, journal = {Doklady Akademii Nauk}, pages = {296--299}, publisher = {mathdoc}, volume = {300}, number = {2}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1988_300_2_a8/} }
S. V. Yushmanov. Metric properties of chordal and Ptolemaic graphs. Doklady Akademii Nauk, Tome 300 (1988) no. 2, pp. 296-299. http://geodesic.mathdoc.fr/item/DAN_1988_300_2_a8/