Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS_1974__135_1_a5, author = {{\CYRS}.{\CYRA}. {\CYRB}{\cyro}{\cyrg}{\cyra}{\cyrt}{\cyrery}{\cyrishrt}}, title = {{\CYRA}{\cyrp}{\cyrp}{\cyrr}{\cyro}{\cyrk}{\cyrs}{\cyri}{\cyrm}{\cyra}{\cyrc}{\cyri}{\cyro}{\cyrn}{\cyrn}{\cyrery}{\cyre} {\cyri} {\cyrf}{\cyru}{\cyrn}{\cyrd}{\cyra}{\cyrm}{\cyre}{\cyrn}{\cyrt}{\cyra}{\cyrl}{\cyrsftsn}{\cyrn}{\cyrery}{\cyre} {\cyrr}{\cyre}{\cyrt}{\cyrr}{\cyra}{\cyrk}{\cyrt}{\cyrery}}, journal = {Matemati\v{c}eskij sbornik}, pages = {90--102}, publisher = {mathdoc}, volume = {135}, number = {1}, year = {1974}, zbl = {0289.54025}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MS_1974__135_1_a5/} }
С.А. Богатый. Аппроксимационные и фундаментальные ретракты. Matematičeskij sbornik, Tome 135 (1974) no. 1, pp. 90-102. http://geodesic.mathdoc.fr/item/MS_1974__135_1_a5/