@article{MZM_1989_46_5_a10,
     author = {K. Alymkulov},
     title = {A problem of singular perturbation with a limit cycle in a subsystem with fast time},
     journal = {Matemati\v{c}eskie zametki},
     pages = {89--91},
     publisher = {mathdoc},
     volume = {46},
     number = {5},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1989_46_5_a10/}
}