Did Weak-line Quasars Just Begin an Active Phase?
Journal article published in 2011 by
Richard M. Plotkin,
S. F. Anderson,
W. N. Brandt,
A. M. Diamond-Stanic,
X. Fan,
C. L. MacLeod,
S. Markoff,
D. P. Schneider,
O. Shemmer 
