XMM-Newton observations of the BL Lac MS 0737+7441Th. Boller, M. Gliozzi, G. Griffiths, S. Sembay, R. Keil, O. Schwentker, W. Brinkmann and S. VercelloneA&A, 365 1 (2001) L158-L161DOI: https://doi.org/10.1051/0004-6361:20000055