@article{SJIM_2002_5_4_a4,
     author = {L. I. Kononenko},
     title = {Qualitative analysis of singularly perturbed systems with one or two slow and fast variables},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {55--62},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2002_5_4_a4/}
}