Gravitational collapse of spherically symmetric stars in noncommutative general relativity Wen Sun, Ding Wang, Naqing Xie, R.B. Zhang and Xiao Zhang Eur. Phys. J. C, 69 1-2 (2010) 271-279 Published online: 27 May 2010 DOI: 10.1140/epjc/s10052-010-1342-2