@article{10_4064_am_11_3_323_330,
     author = {J. Miku\'s},
     title = {Angen\"aherte {Schwingungsfrequenzformeln} f\"ur konservative {Systeme} (4)},
     journal = {Applicationes Mathematicae},
     pages = {323--330},
     publisher = {mathdoc},
     volume = {11},
     number = {3},
     year = {1969},
     doi = {10.4064/am-11-3-323-330},
     zbl = {0246.34042},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-11-3-323-330/}
}