On the properties of central dispersions of linear second order differential equations being of finite type-special Eva Tesaříková (1989) Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica Similarity:
On algebraic properties of dispersions of the 3rd and 4th kind of the differential equation y ' ' = q ( t ) y Irena Rachůnková (1975) Časopis pro pěstování matematiky Similarity: