@article{MS2_1961__9_165763,
     author = {Jan Lanke},
     title = {On the {Asymptotic} {Distribution} of {Eigenvalues} of {Certain} {One-Dimensional} {Sturm-Liouville} {Operators.}},
     journal = {Mathematica Scandinavica},
     pages = {69--79},
     publisher = {mathdoc},
     volume = {9},
     year = {1961},
     zbl = {0102.30201},
     url = {http://geodesic.mathdoc.fr/item/MS2_1961__9_165763/}
}