Astronomy and Astrophysics Supplement Series

The long-term optical behavior of Mkn 421

F. K. Liu, B. F. Liu and G. Z. Xie

Astron. Astrophys. Suppl. Ser., 123 3 (1997) 569-574

Published online: 15 June 1997

DOI: 10.1051/aas:1997173

F. K. Liu

B. F. Liu

G. Z. Xie

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