Optical variability of the BL Lacertae object GC 0109+224 - Multiband behaviour and time scales from a 7-years monitoring campaignS. Ciprini, G. Tosti, C. M. Raiteri, M. Villata, M. A. Ibrahimov, G. Nucciarelli and L. LanteriA&A, 400 2 (2003) 487-498DOI: https://doi.org/10.1051/0004-6361:20030045
