Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MO_2021_100_4_a2, author = {B. L. Druzhinin}, title = {Contrary the logic}, journal = {Matemati\v{c}eskoe obrazovanie}, pages = {6--8}, publisher = {mathdoc}, volume = {100}, number = {4}, year = {2021}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MO_2021_100_4_a2/} }
B. L. Druzhinin. Contrary the logic. Matematičeskoe obrazovanie, Tome 100 (2021) no. 4, pp. 6-8. http://geodesic.mathdoc.fr/item/MO_2021_100_4_a2/