Theory of magnetic field control on polarization in multiferroic RCrO3 compounds Angel T. Apostolov, Iliana N. Apostolova and Julia M. Wesselinowa Eur. Phys. J. B, 88 12 (2015) 328 Published online: 09 December 2015 DOI: 10.1140/epjb/e2015-60649-4