Deep imaging of the shell elliptical galaxy NGC 3923 with MegaCam M. Bílek, J.-C. Cuillandre, S. Gwyn, I. Ebrová, K. Bartošková, B. Jungwiert and L. Jílková A&A, 588 (2016) A77 Published online: 22 March 2016 DOI: 10.1051/0004-6361/201526608