@article{MZM_2009_85_5_a15,
     author = {V. I. Pokotilo},
     title = {Semiclassical {Approximation} for the {Non-Self-Adjoint} {Sturm--Liouville} {Problem} with the {Potential} $q(x)=x^4-a^2x^2$},
     journal = {Matemati\v{c}eskie zametki},
     pages = {792--796},
     publisher = {mathdoc},
     volume = {85},
     number = {5},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2009_85_5_a15/}
}