Deformation splittings in the spectra of LaAlO3: Ho3+, Pr3+, Tm3+ single crystals K.N. Boldyrev, P. Dereń and M.N. Popova EPJ Web Conf., 132 (2017) 03004 Published online: 13 December 2016 DOI: 10.1051/epjconf/201713203004