On markaryan 6 and the problem of the intermediate Sy 1.5 type Khachikyan, É. E. ; Popov, V. N. ; Egiazaryan, A. A. Abstract Publication: Astrophysics Pub Date: October 1982 DOI: 10.1007/BF01005668 Bibcode: 1982Ap.....18..308K