Spectroscopic monitoring of the LBV-like WR star HD 5980 in the SMC with FEROS - Schweickhardt, Jörg; Wolf, Bernhard; Schmid, Hans Martin; Kaufer, Andreas; Stahl, Otmar; Szeifert, Thomas; Tubbesing, Sascha (Thermal and ionization aspects of flows from hot stars, 2000)