00918nam0-22003131i-450-9900013636904033210-8218-1042-1000136369FED01000136369(Aleph)000136369FED0100013636920000920d1990----km-y0itay50------baengVariations on a theme by KeplerVictor Guillemin and Shlomo SternbergProvidenceAmerican Mathematical Society1990American mathematical society colloquium publications42RelativitàGravità530.11Guillemin,Victor<1937- >40563Sternberg,ShlomoITUNINARICAUNIMARCBK99000136369040332123-2675856FI1FI1Variations on a theme by Kepler375446UNINAING01