Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{KVANT_2018_10_a8, title = {{\CYRE}{\cyrshch}{\cyre} {\cyrr}{\cyra}{\cyrz} {\cyro} {\cyrp}{\cyro}{\cyrs}{\cyrt}{\cyrr}{\cyro}{\cyre}{\cyrn}{\cyri}{\cyri} {\cyrk}{\cyra}{\cyrs}{\cyra}{\cyrt}{\cyre}{\cyrl}{\cyrsftsn}{\cyrn}{\cyro}{\cyrishrt}}, journal = {Kvant}, pages = {14, 25}, publisher = {mathdoc}, number = {10}, year = {2018}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KVANT_2018_10_a8/} }
Еще раз о построении касательной. Kvant, no. 10 (2018). http://geodesic.mathdoc.fr/item/KVANT_2018_10_a8/