@article{AA_2002_14_4_a0,
     author = {V. S. Buslaev},
     title = {Asymptotic comparison of differential equations},
     journal = {Algebra i analiz},
     pages = {1--18},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2002_14_4_a0/}
}