@article{ZNSL_1972_24_a7,
     author = {N. A. Lebedev and Din' Van F'eu},
     title = {On the {Golusin} variational formula},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {173--181},
     publisher = {mathdoc},
     volume = {24},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1972_24_a7/}
}