@article{MAIS_2016_23_1_a4,
     author = {S. A. Kashchenko},
     title = {Asymptotic expansions of eigenvalues of periodic and antiperiodic boundary problems for singularly perturbed second order differential equation with turning points},
     journal = {Modelirovanie i analiz informacionnyh sistem},
     pages = {61--85},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {2016},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAIS_2016_23_1_a4/}
}