@article{FPM_2004_10_1_a11,
     author = {A. Sergyeyev},
     title = {On the classification of conditionally integrable evolution systems in $(1+1)$ dimensions},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {243--253},
     publisher = {mathdoc},
     volume = {10},
     number = {1},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2004_10_1_a11/}
}