@article{AUPO_1982__21_1_a3,
     author = {Ho\v{s}ek, Josef},
     title = {Zu einer {Eigenschaft} von {Phasen} der {Differentialgleichungen} zweiter {Ordnung}},
     journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica},
     pages = {37--42},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1982},
     mrnumber = {0702606},
     zbl = {0531.34006},
     language = {ge},
     url = {http://geodesic.mathdoc.fr/item/AUPO_1982__21_1_a3/}
}