@article{10_21136_AM_1970_103306,
     author = {\'Ulehla, Ivan and Wiesner, Jan},
     title = {Remark to the problem of eigenvalues of {Schr\"odinger} equation},
     journal = {Applications of Mathematics},
     pages = {352--355},
     publisher = {mathdoc},
     volume = {15},
     number = {5},
     year = {1970},
     doi = {10.21136/AM.1970.103306},
     mrnumber = {0267181},
     zbl = {0208.11202},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1970.103306/}
}