Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_1987_1_1_a3, author = {G. Isac}, title = {A {Fixed} {Point} {Theorem.} {Application} to {Ershov's} {Optimization} {Problem} (in {French)}}, journal = {Mathematica balkanica}, pages = {33}, publisher = {mathdoc}, volume = {1}, number = {1}, year = {1987}, url = {http://geodesic.mathdoc.fr/item/MABA_1987_1_1_a3/} }
G. Isac. A Fixed Point Theorem. Application to Ershov's Optimization Problem (in French). Mathematica balkanica, Tome 1 (1987) no. 1, p. 33. http://geodesic.mathdoc.fr/item/MABA_1987_1_1_a3/