[2] HARTMAN P.: Obvyknovennyje diferenciaľnyje uravnenija. Izdat. MIR, Moskva 1970, translation from English.
[3] RUSNÁK J.:
A three-point boundary value problem for third order differential equations. Math. Slovaca 33, 1983, 307-320.
MR 0713954 |
Zbl 0526.34012