@article{119980,
author = {Milo\v s H\'a\v cik},
title = {On a certain modification of Sturm's comparison theorem},
journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
volume = {12},
year = {1972},
pages = {15-18},
zbl = {0396.34025},
mrnumber = {0348185},
language = {en},
url = {http://dml.mathdoc.fr/item/119980}
}
Háčik, Miloš. On a certain modification of Sturm's comparison theorem. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 12 (1972) pp. 15-18. http://gdmltest.u-ga.fr/item/119980/
Diferenciálne rovnice, SPN Bratislava 1961. (1961)
Generalization of Amplitude, Phase and Accompanying Differential Equation, Acta Univ. Palack. Olomucensis (to appear). | MR 0352583 | Zbl 0261.34006