Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2015_1_a27, title = {{\CYRI}{\cyrz}{\cyrb}{\cyrr}{\cyra}{\cyrn}{\cyrn}{\cyrery}{\cyre} {\cyrz}{\cyra}{\cyrd}{\cyra}{\cyrch}{\cyri} {LXXX} {{\CYRS}{\cyra}{\cyrn}{\cyrk}{\cyrt}-{\CYRP}{\cyre}{\cyrt}{\cyre}{\cyrr}{\cyrb}{\cyru}{\cyrr}{\cyrg}{\cyrs}{\cyrk}{\cyro}{\cyrishrt}} {\cyro}{\cyrl}{\cyri}{\cyrm}{\cyrp}{\cyri}{\cyra}{\cyrd}{\cyrery} {\cyrp}{\cyro} {\cyrm}{\cyra}{\cyrt}{\cyre}{\cyrm}{\cyra}{\cyrt}{\cyri}{\cyrk}{\cyre}}, journal = {Kvant}, pages = {61--64}, publisher = {mathdoc}, number = {1}, year = {2015}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2015_1_a27/} }
Избранные задачи LXXX Санкт-Петербургской олимпиады по математике. Kvant, no. 1 (2015), pp. 61-64. http://geodesic.mathdoc.fr/item/KVANT_2015_1_a27/