Voir la notice de l'article provenant de la source Math-Net.Ru
@article{FAA_1996_30_3_a11, author = {V. D. Sedykh}, title = {Theorem on {Four} {Support} {Vertices} of a {Polygonal} {Line}}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {88--90}, publisher = {mathdoc}, volume = {30}, number = {3}, year = {1996}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1996_30_3_a11/} }
V. D. Sedykh. Theorem on Four Support Vertices of a Polygonal Line. Funkcionalʹnyj analiz i ego priloženiâ, Tome 30 (1996) no. 3, pp. 88-90. http://geodesic.mathdoc.fr/item/FAA_1996_30_3_a11/