Anillos con modulosplanos libres de Torsion Gómez Torrecillas, José Torrecillas Jover, Blas 2014-07-09T08:58:19Z 2014-07-09T08:58:19Z 1992 doctoral thesis http://hdl.handle.net/10481/32617 spa http://creativecommons.org/licenses/by/3.0 open access Creative Commons Attribution 3.0 License Universidad de Granada