Aleksi? J., Antonelli L.A, Antoranz P., Backes M., Barrio J.A, Bastieri D., J. González B, Bednarek W., Berdyugin A., Berger K. et al..  2011.  Observations of the Blazar 3C 66A with the Magic Telescopes in Stereoscopic Mode. The Astrophysical Journal. 726:58.