Age spread in W3 main: large binocular telescope/LUCI near-infrared spectroscopy of the mssive stellar content - Bik, Arjan; Gouliermis, Dimitrios A.; Pasquali, Anna; Seifert, Walter; Kudryavtseva, Natalia (The astrophysical journal, 2012)
Gesehen am 11.06.2013