Voir la notice de l'article provenant de la source Hellenic Digital Mathematics Library
@article{EUG_1991__28_a0, author = {Frank Harary}, title = {Conditional {Graph} {Theory} {III:} {Independence} {Numbers}}, journal = {E\ensuremath{\upsilon}\ensuremath{\kappa}\ensuremath{\lambda}\ensuremath{\varepsilon}\ensuremath{\acute\iota}\ensuremath{\delta}\ensuremath{\eta}\ensuremath{\varsigma} \ensuremath{\Gamma} }, pages = {1-8}, publisher = {mathdoc}, volume = {28}, year = {1991}, language = {gr}, url = {http://geodesic.mathdoc.fr/item/EUG_1991__28_a0/} }
Frank Harary. Conditional Graph Theory III: Independence Numbers. Ευκλείδης Γ , Tome 28 (1991), p. 1-8. http://geodesic.mathdoc.fr/item/EUG_1991__28_a0/