Einstein–Cartan gravitational collapse of a homogeneous Weyssenhoff fluid Amir Hadi Ziaie, Paulo Vargas Moniz, Arash Ranjbar and Hamid Reza Sepangi Eur. Phys. J. C, 74 11 (2014) 3154 Published online: 15 November 2014 DOI: 10.1140/epjc/s10052-014-3154-2