Urry, C M. (1993). Multiwavelength monitoring of the BL Lacertae object PKS 2155-304: I. The IUE campaign. The astrophysical journal, 411, .

"Multiwavelength monitoring of the BL Lacertae object PKS 2155-304 : I. The IUE campaign / C.M. Urry, L. Maraschi, R. Edelson, A. Koratkar, J. Krolik, G. Madejski, E. Pian, G. Pike, G. Reichert, A. Treves, W. Wamsteker, R. Bohlin, J. Bregman, W. Brinkmann, L. Chiappetti, T. Courvoisier, A.V. Filippenko, H. Fink, I.M. George, Y. Kondo, P.G. Martin, H.R. Miller, P. O’Brien, J.M. Shull, M. Sitko, A.E. Szymkowiak, G. Tagliaferri, S. Wagner, R. Warwick" The Astrophysical Journal .

Urry, C. Megan. "Multiwavelength Monitoring of the BL Lacertae Object PKS 2155-304: I. The IUE Campaign." The Astrophysical Journal 411 (1993).