A multi-epoch spectroscopic study of the BAL quasar APM 08279+5255 - I. C IV absorption variabilityD. Trevese, F. G. Saturni, F. Vagnetti, M. Perna, D. Paris and S. TurrizianiA&A, 557 (2013) A91DOI: https://doi.org/10.1051/0004-6361/201321864
