Magnetocaloric effect and magnetic refrigeration in La0.7Ca0.15Sr0.15Mn1-xGaxO3 (0 ≤ x ≤ 0.1) S. Othmani and M. Balli EPJ Web of Conferences, 29 (2012) 00049 Published online: 18 June 2012 DOI: 10.1051/epjconf/20122900049