@article{120286, author = {Miroslav Laitoch}, title = {A contribution to the phase theory of a linear second-order differential equation in the Jacobian form}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {32}, year = {1993}, pages = {99-110}, zbl = {0798.34009}, mrnumber = {1273173}, language = {en}, url = {http://dml.mathdoc.fr/item/120286} }
Laitoch, Miroslav. A contribution to the phase theory of a linear second-order differential equation in the Jacobian form. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 32 (1993) pp. 99-110. http://gdmltest.u-ga.fr/item/120286/
Lineare Differential transformationen 2. Ordnung, VEB DVW, Berlin 1967. (1967) | MR 0236448
Linear Differential Transformations of the Second Order, The English University Press, London, 1971 | MR 0463539
To the Theory of Linear Difference Equations, Acta UPO, Fac. Rer. Nat., Vol. 79 (1985), 11-24. (1985) | MR 0837025
To the Theory of Central Disprsions for the Linear Differential Equations y" = q(t)y of a Finite Type, Special, Acta UPO, Fac. Rer. Nat., Vol. 88 (1987). (1987) | MR 1033333