Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_2005_19_1-2_a11, author = {Ljubisa D.R. Kocinac}, title = {?-Sets, {Yk-Sets} and {Hyperspaces}}, journal = {Mathematica balkanica}, pages = {109}, publisher = {mathdoc}, volume = {19}, number = {1-2}, year = {2005}, url = {http://geodesic.mathdoc.fr/item/MABA_2005_19_1-2_a11/} }
Ljubisa D.R. Kocinac. ?-Sets, Yk-Sets and Hyperspaces. Mathematica balkanica, Tome 19 (2005) no. 1-2, p. 109. http://geodesic.mathdoc.fr/item/MABA_2005_19_1-2_a11/