The PG X-Ray QSO sample: Links between the UV-X-Ray Continuum and Emission Lines
Proceedings article published in 1999 by
B.~J Wills,
M. Brotherton,
A. Laor,
D. Wills,
B.~J Wilkes,
G.~J Ferland 
,
Z. Shang
,
Z. Shang
