@article{VTGU_2013_1_a4,
     author = {D. A. Tursunov},
     title = {Asymptotic expansion of the solution of a singularly perturbed ordinary second-order differential equation with two turning points},
     journal = {Vestnik Tomskogo gosudarstvennogo universiteta. Matematika i mehanika},
     pages = {34--40},
     publisher = {mathdoc},
     number = {1},
     year = {2013},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTGU_2013_1_a4/}
}