TY - JOUR AU - V. R. Kudashev AU - S. E. Sharapov TI - Inheritance of KdV symmetries under Whitham averaging and hydrodynamic symmetries of the Witham equations JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1991 SP - 40 EP - 47 VL - 87 IS - 1 UR - http://geodesic.mathdoc.fr/item/TMF_1991_87_1_a3/ LA - ru ID - TMF_1991_87_1_a3 ER -