A multi-epoch spectroscopic study of the BAL quasar APM 08279+5255 - II. Emission- and absorption-line variability time lagsF. G. Saturni, D. Trevese, F. Vagnetti, M. Perna and M. DadinaA&A, 587 (2016) A43DOI: https://doi.org/10.1051/0004-6361/201527152
