@article{120245, author = {Miroslav Laitoch}, title = {Associated differential equation to a selfadjoint third-order linear differential equation}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {29}, year = {1990}, pages = {73-82}, zbl = {0756.34012}, mrnumber = {1144832}, language = {en}, url = {http://dml.mathdoc.fr/item/120245} }
Laitoch, Miroslav. Associated differential equation to a selfadjoint third-order linear differential equation. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 29 (1990) pp. 73-82. http://gdmltest.u-ga.fr/item/120245/
Linear Differential Transformations of the Second Order, The English Universities Press Ltd., London, 1971. (1971) | MR 0463539