Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1978_23_2_a5, author = {G. S. Shpak}, title = {A~covering for bounded functions, taking given values at two points}, journal = {Matemati\v{c}eskie zametki}, pages = {231--235}, publisher = {mathdoc}, volume = {23}, number = {2}, year = {1978}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1978_23_2_a5/} }
G. S. Shpak. A~covering for bounded functions, taking given values at two points. Matematičeskie zametki, Tome 23 (1978) no. 2, pp. 231-235. http://geodesic.mathdoc.fr/item/MZM_1978_23_2_a5/