Hoffmann
Journal of Organic Chemistry, 1949 , vol. 14, p. 107

Katritzky, Alan R.; Patel, Ranjan C.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 2901 - 2903

Shellhamer, Dale F.; Anstine, D. Timothy; Gallego, Kelly M.; Ganesh, Brian R.; Hanson, Aaron A.; et al.
Journal of the Chemical Society, Perkin Transactions 2: Physical Organic Chemistry (1972-1999), 1995 , # 4 p. 861 - 866

Katritzky, Alan R.; Patel, Ranjan C.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 2901 - 2903

Matsuura, Hiroatsu; Sakakibara, Masaaki; Murata, Hiromu
Chemistry Letters, 1982 , p. 951 - 952

Hoffmann
Journal of Organic Chemistry, 1949 , vol. 14, p. 107