@article{JRAM_1987__0375_0376_152919,
     author = {F.V. Atkinson and A.B. Mingarelli},
     title = {Asymptotics of the number of zeros and of the eigenvalues of general weighted {Sturm-Liouville} problems.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {380--393},
     publisher = {mathdoc},
     volume = {0375_0376},
     year = {1987},
     zbl = {0599.34026},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1987__0375_0376_152919/}
}