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Wengrovius, Jeffrey H.; Schrock, Richard R.; Churchill, Melvyn Rowen; Missert, Joseph R.; Youngs, Wiley J. . (1980). Multiple metal-carbon bonds. 16. Tungsten-oxo alkylidene complexes as olefins metathesis catalysts and the crystal structure of W(O)(CHCMe3(PEt3)Cl2. Journal of the American Chemical Society, 102(13), 4515–4516. doi:10.1021/ja00533a035 
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