1 O.. Elgaroy, P.B. Joras, O.. Engvold, E.. Jensen, B.R. Pettersen, T.R. Ayres, C.W. Ambruster, J.L. Linsky, M.. Clark, W.E. Kunkel, and F.. Marang, Astronomy and Astrophysics 193, (1988).
1 O.. Elgaroy, P.B. Joras, O.. Engvold, E.. Jensen, B.R. Pettersen, T.R. Ayres, C.W. Ambruster, J.L. Linsky, M.. Clark, W.E. Kunkel, and F.. Marang, Astron. Astrophys. 193, (1987).