Henze M, Pietsch W, Haberl F, Hernanz M, Sala G, Della Valle M, Hatzidimitriou D, Rau A, Hartmann DH, Greiner J, et al. X-ray monitoring of classical novae in the central region of M 31. I. June 2006-March 2007.  [Internet]. 2010;523:A89.