Starburst99: Synthesis Models for Galaxies with Active Star Formation - Leitherer, Claus; Schaerer, Daniel; Goldader, Jeffrey D; Delgado, Rosa M. González; Robert, Carmelle; Kune, Denis Foo; de Mello, Duília F; Devost, Daniel; Heckman, Timothy M (The Astrophysical journal. Supplement series, 1999)