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Musigmann, Klaus and Mayr, Herbert and Meijere, Armin de (1990): Regio- and stereoselective ring-opening reactions of cyclopropenones. α-methylene-γ-butyrolactones via additions of trichlorocyclopropenylium ions to alkenes. In: Tetrahedron Letters, Vol. 31, No. 9: pp. 1261-1264

Musigmann, Klaus and Mayr, Herbert and Meijere, Armin de (1987): Addition reactions of the trichlorocyclopropenylium ion with alkenes. A novel access to cyclopropene and cyclopropenone derivatives. In: Tetrahedron Letters, Vol. 28, No. 39: pp. 4517-4520