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1) Polyhedron, 1989
Volume 8, Issue 23, Pages 2785-2789
Studies of bonding properties of incomplete metallic cubane-type cluster compounds containing the M3X4-nYn core (M = Mo, W; X = O, S, Cl, Br; Y = O, S; n = 0, 1)
Cheng Wendan, Zhang Qianer, Huang Jinshun and Lu Jiaxi
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http://dx.doi.org/10.1016/S0277-5387(00)80536-7Volume 13, Issue 12, Pages 1841-1851
Electronic structures and d---pπ bonding of some M3X4+4 cluster compounds
Jun Li, Chun-Wan Liu and Jia-Xi Lu
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http://dx.doi.org/10.1016/0277-5387(94)80006-5