Authors: V B Zabolotnyy; D S Inosov; D V Evtushinsky; A Koitzsch; A A Kordyuk; G L Sun; J T Park; D Haug; V Hinkov; A V Boris; C T Lin; M Knupfer; A N Yaresko; B Büchner; A Varykhalov; R Follath; S V Borisenko Journal: Nature Date: 2009-01-29 Impact factor: 49.962