@article{100652, author = {Marko \v Svec}, title = {Neskol'ko zamechanii o lineinom differentsial'nom uravnenii tret'ego poriadka}, journal = {Czechoslovak Mathematical Journal}, volume = {15}, year = {1965}, pages = {42-49}, zbl = {0129.06203}, mrnumber = {0171970}, language = {ru}, url = {http://dml.mathdoc.fr/item/100652} }
Švec, Marko. Несколько замечаний о линейном дифференциальном уравнении третьего порядка. Czechoslovak Mathematical Journal, Tome 15 (1965) pp. 42-49. http://gdmltest.u-ga.fr/item/100652/
Oscillation criteria for third-order linear differential equations, Рас. J. Math. 11 (1961), 919-944. (1961) | MR 0145160 | Zbl 0104.30901
Decomposizione delle espressioni diferenziali lineari omogenee in prodotti di fattori simbolici e applicazione relativa allo studio delle equazioni differenziali lineari, Math. Z. 33 (1931), 186-231. (1931) | Article | MR 1545209