[1] Borůvka O.: Lineare Differentialtransformationen 2.Ordnung. VEB OVW, Berlin (1967).
[2] Laitoch M.:
To the theory of linear difference equations. Acta Univ.Palackianae Olomucensis (Olomouc), Fac.Rer.Nat. 79 (1984).
MR 0837025 |
Zbl 0586.39002
[3] Tesaříková E.:
To the theory of central dispersions for the linear differential equations y" = q(t)y of a finite type-special. Acta Univ.Palackianae Olomucensis (Olomouc), Fac.Rer.Nat. 88 (1987).
MR 1033333
[4] Tesaříková E.:
On the properties of central dispersions of linear second order differential equations being of finite type-special. Acta Univ.Palackianae Olomucensis (Olomouc), Fac.Rer.Nat. (1989).
Zbl 0713.34012