Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_1993_7_2_a8, author = {G. Kirov and L. Popova}, title = {A {Generalization} of the {Linear} {Positive} {Operators}}, journal = {Mathematica balkanica}, pages = {149}, publisher = {mathdoc}, volume = {7}, number = {2}, year = {1993}, url = {http://geodesic.mathdoc.fr/item/MABA_1993_7_2_a8/} }
G. Kirov; L. Popova. A Generalization of the Linear Positive Operators. Mathematica balkanica, Tome 7 (1993) no. 2, p. 149. http://geodesic.mathdoc.fr/item/MABA_1993_7_2_a8/