@article{MZ_1995__219_2_174785,
     author = {Tetsutaro Shibata},
     title = {Asypmtotic formulas of eigenvalues and eigenfucntions on non-autonomous semilinear {Sturm-Liouville} problems.},
     journal = {Mathematische Zeitschrift},
     pages = {485--498},
     publisher = {mathdoc},
     volume = {219},
     number = {2},
     year = {1995},
     zbl = {0827.34074},
     url = {http://geodesic.mathdoc.fr/item/MZ_1995__219_2_174785/}
}