https://arxiv.org/abs/cond-mat/0504524
[cond-mat/0504524] Covalent bonding and hybridization effects in the corundum-type transition-metal...
Abstract page for arXiv paper cond-mat/0504524: Covalent bonding and hybridization effects in the corundum-type transition-metal oxides V2O3 and Ti2O3