@article{MZM_2000_68_3_a1,
     author = {O. V. Viskov},
     title = {Darboux's identity and its analogs},
     journal = {Matemati\v{c}eskie zametki},
     pages = {332--338},
     publisher = {mathdoc},
     volume = {68},
     number = {3},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2000_68_3_a1/}
}