Variability of the X-Ray Spectral Components in the NLS1 Galaxies Akn 564 and Ton S180
Proceedings article published in 2001 by
P. Romano 
,
T.~J J. Turner,
I.~M M. George,
S.~J J. Collier,
S. Mathur,
B.~M M. Peterson
,
T.~J J. Turner,
I.~M M. George,
S.~J J. Collier,
S. Mathur,
B.~M M. Peterson
