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He, Ying Ma, Xiaoyun Ji, Hai Feng Zha, Xin Bing Jiang, Hongliang Lu, Ming Phosphorus, Sulfur and Silicon and the Related Elements, 2012 , vol. 187, # 7 p. 822 - 830
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De Gonzalo, Gonzalo Torres Pazmino, Daniel E. Ottolina, Gianluca Fraaije, Marco W. Carrea, Giacomo Tetrahedron Asymmetry, 2005 , vol. 16, # 18 p. 3077 - 3083