@article{ZVMMF_1996_36_5_a8,
     author = {A. S. Avdeev and A. B. Vasil'eva},
     title = {On a contrast structure of step type for a system of two second-order singularly perturbed equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {75--89},
     publisher = {mathdoc},
     volume = {36},
     number = {5},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1996_36_5_a8/}
}