The spectroscopic evolution of the γ-ray emitting classical nova Nova Mon 2012 - I. Implications for the ONe subclass of classical novaeS. N. Shore, I. De Gennaro Aquino, G. J. Schwarz, T. Augusteijn, C. C. Cheung, F. M. Walter and S. StarrfieldA&A, 553 (2013) A123DOI: https://doi.org/10.1051/0004-6361/201321095