R. Kneer

Rapid variability in S5 0716+714 across the electromagnetic spectrum

A. Eckart, A. Quirrenbach, T. Krichbaum, 1996 .

Identification of a Complete Sample of Northern ROSAT All-Sky Survey X-Ray Sources. III. The Catalog

W. Voges, J. Krautter, I. Appenzeller, 1998 .

Identification of a complete sample of northern ROSAT All-Sky Survey X-ray sources - II. The optical observations

Wolfgang Voges, F.-J. Zickgraf, Bodo L. Ziegler, 1997 .

Identification of a Complete Sample of Northern Rosat All-Sky Survey X-Ray Sources

J. Krautter, F. Zickgraf, Á. Serrano, 1998 .