“Structures of Mo2Oy− and Mo2Oy (y = 2, 3, and 4) studied by anion photoelectron spectroscopy and density functional theory calculations”, Bruce L. Yoder, Joshua T. Maze, Krishnan Raghavachari, and Caroline Chick Jarrold, Journal of Chemical Physics 122 Art. No. 094313 (2005). https://doi.org/10.1063/1.1853379