Multi-band optical micro-variability observations of the BL Lac object S4 0954+658I. E. Papadakis, V. Samaritakis, P. Boumis and J. PapamastorakisA&A, 426 2 (2004) 437-443DOI: https://doi.org/10.1051/0004-6361:20040446
