@article{104676, author = {Valter \v Seda}, title = {A comparison theorem in the theory of the second-order linear differential transformations}, journal = {Archivum Mathematicum}, volume = {005}, year = {1969}, pages = {7-17}, zbl = {0242.34036}, mrnumber = {0274862}, language = {en}, url = {http://dml.mathdoc.fr/item/104676} }
Šeda, Valter. A comparison theorem in the theory of the second-order linear differential transformations. Archivum Mathematicum, Tome 005 (1969) pp. 7-17. http://gdmltest.u-ga.fr/item/104676/
Ordinary Differential Equations, Ginn and Company, Boston 1962. (1962) | MR 0138810
Lineare Differentialtransformationen 2. Ordnung, VEB Deutscher Verlag der Wissenschaften, Berlin 1967. (1967) | MR 0236448
Theory of Ordinary Differential Equations, McGraw-Hill Book Company, Inc. New York 1955. (1955) | MR 0069338