Della Valle, F.; Di Domenico, G.; Gastaldi, U.; Milotti, E.; et al. (2013). "The new PVLAS apparatus for detection of magnetic birefringence of vacuum". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 718: 495–496. Bibcode:2013NIMPA.718..495D. doi:10.1016/j.nima.2012.11.084.
Della Valle, F.; Di Domenico, G.; Gastaldi, U.; Milotti, E.; et al. (2013). "The new PVLAS apparatus for detection of magnetic birefringence of vacuum". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 718: 495–496. Bibcode:2013NIMPA.718..495D. doi:10.1016/j.nima.2012.11.084.