TY - JOUR AU - Yu. N. Zavarovskii TI - Normal form of the key function of the generalized Kirchhoff equation JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1983 SP - 159 EP - 160 VL - 38 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RM_1983_38_3_a13/ LA - en ID - RM_1983_38_3_a13 ER -