Date Issued <Equals> "[2000 TO 2009]" Author <Equals> "Schumann, Herbert" <Equals> "true" Author <Equals> "Hummert, Markus" Subject <Equals> "540 Chemie und zugeordnete Wissenschaften" Author <Equals> "Janek, Katharina" Subject <Equals> "rare earth complexes" Type <Equals> "Article" Date Issued <Equals> "2007" Subject <Equals> "Tetraazacyclododecane"