Stellar and circumstellar variability of the Be star mu Cen IV - Rivinius, Thomas J.; Stahl, Otmar; Wolf, Bernhard; Kaufer, Andreas; Gummersbach, Christoph; Mandel, Holger; Peitz, Jochen; Schweickhardt, Jörg; Szeifert, Thomas; Tubbesing, Sascha (The journal of astronomical data, 2001)