@article{Galanti:2015al, author = "Galanti, Giorgio and Roncadelli, M. and Tavecchio, Fabrizio and Bonnoli, Giacomo", title = "{Hints for an axion-like particle from PKS 1222+216}", doi = "10.22323/1.218.0022", journal = "PoS", year = 2015, volume = "Scineghe2014", pages = "022" }