@article{SJIM_2003_6_4_a3,
     author = {L. I. Kononenko},
     title = {Infinitesimal analysis of singular systems with fast and slow variables},
     journal = {Sibirskij \v{z}urnal industrialʹnoj matematiki},
     pages = {51--59},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SJIM_2003_6_4_a3/}
}