TY - JOUR A1 - Deuflhard, Peter T1 - Kepler discretization in regular celestial mechanics T2 - Celestial Mech. Y1 - 1980 UR - https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/2046 VL - 21 SP - 213 EP - 223 ER -