@article{AUPO_1990_29_1_a5,
     author = {Laitoch, Miroslav},
     title = {Associated differential equation to a selfadjoint third-order linear differential equation},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {73--82},
     year = {1990},
     volume = {29},
     number = {1},
     mrnumber = {1144832},
     zbl = {0756.34012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1990_29_1_a5/}
}