TY - JOUR AU - A. I. Neishtadt TI - Jumps of the adiabatic invariant on crossing the separatrix, and the origin of the Kirkwood gap $3:1$ JO - Doklady Akademii Nauk PY - 1987 SP - 47 EP - 50 VL - 295 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1987_295_1_a8/ LA - ru ID - DAN_1987_295_1_a8 ER -