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P. Zavlin | D. A. Efremov | J. Tebby | N. S. Essentseva
[1] P. Zavlin,et al. The phosphorylation of organic compounds by phosphoric anhydride. Part 3. Synthesis of monosubstituted ketenes in the reaction of esters with phosphoric anhydride and cyclotrimerization of these ketenes , 1994 .