@article{MZM_1984_35_3_a12,
     author = {S. V. Khabirov},
     title = {Computation of the {Lie-B\"acklund} algebras for second-order equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {435--444},
     publisher = {mathdoc},
     volume = {35},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1984_35_3_a12/}
}