[1] O. Borůvka:
Linear Differential Transformations of the Second Order. The English Universities Press, London 1971.
MR 0463539
[2] О. Борувка:
Теория глобальных свойств обыкновенных дифференциальных уравнений второго порядка. Дифференциальные уравнения, Но. 8, T. XII, 1976, 1347-1383.
Zbl 1170.01332
[3] M. Greguš F. Neuman, F. M. Arscott:
Three-point boundary problems in differential equations. J. London Math. Soc. (2), 3 (1971), 429-436.
MR 0283282
[4] P. Hartman:
Ordinary Differential Equations. (in Russian) Moscow 1970.
Zbl 0214.09101
[5] M. Laitoch:
A modification of the Sturm's theorem on separating zeros of solutions of a linear differential equation of the 2nd order. Acta Univ. Palackianae Olomucensis, 57 (1978), 27-32.
MR 0554033 |
Zbl 0429.34011
[6] A. Skidmore, W. Leighton:
On the differential equation $y" + p(x)y= f(x)$. J. Math. Anal. Appl. 43 (1973), 46-55.
MR 0315213
[7] S. Staněk:
On the properties of the fundamental dispersions of the equation $y" = \lambda q(t)y$. Acta Univ. Palackianae Olomucensis, 61 (1979), 51-58.
MR 0589847