Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_2006_42_1_a13, author = {C. Tun\c{c} and E. Tun\c{c}}, title = {An instability theorem for a class of eighth-order differential equations}, journal = {Differencialʹnye uravneni\^a}, pages = {135--138}, publisher = {mathdoc}, volume = {42}, number = {1}, year = {2006}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_2006_42_1_a13/} }
C. Tunç; E. Tunç. An instability theorem for a class of eighth-order differential equations. Differencialʹnye uravneniâ, Tome 42 (2006) no. 1, pp. 135-138. http://geodesic.mathdoc.fr/item/DE_2006_42_1_a13/