Voir la notice de l'article provenant de la source Math-Net.Ru
@article{KVANT_2009_4_a9, author = {A. Spivak}, title = {{\CYRP}{\cyro}{\cyrd} {\cyrd}{\cyra}{\cyrn}{\cyrn}{\cyrery}{\cyrm} {\cyru}{\cyrg}{\cyrl}{\cyro}{\cyrm}}, journal = {Kvant}, pages = {32--33}, publisher = {mathdoc}, number = {4}, year = {2009}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2009_4_a9/} }
A. Spivak. Под данным углом. Kvant, no. 4 (2009), pp. 32-33. http://geodesic.mathdoc.fr/item/KVANT_2009_4_a9/