Wide band X-ray and optical observations of the BL Lac object 1ES 1959+650 in high stateG. Tagliaferri, M. Ravasio, G. Ghisellini, F. Tavecchio, P. Giommi, E. Massaro, R. Nesci and G. TostiA&A, 412 3 (2003) 711-720DOI: https://doi.org/10.1051/0004-6361:20034051
