Discrete gap solitons in a diffraction-managed waveguide array P. G. Kevrekidis, B. A. Malomed and Z. Musslimani Eur. Phys. J. D, 23 3 (2003) 421-436 Published online: 24 April 2003 DOI: 10.1140/epjd/e2003-00065-1