Numerical simulations of composite supernova remnants for small σ pulsar wind nebulae M. J. Vorster, S. E. S. Ferreira, O. C. de Jager and A. Djannati-Ataï A&A, 551 (2013) A127 Published online: 05 March 2013 DOI: 10.1051/0004-6361/201220276