@article{RM_1983_38_3_a13,
     author = {Yu. N. Zavarovskii},
     title = {Normal form of the key function of the generalized {Kirchhoff} equation},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {159--160},
     publisher = {mathdoc},
     volume = {38},
     number = {3},
     year = {1983},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1983_38_3_a13/}
}