v.Braun; Heider; Mueller
Chemische Berichte, 1918 , vol. 51, p. 279

Ahmad, S. S.; Haider, S. I.; Fatima, I.
Synthetic Communications, 1987 , vol. 17, # 15 p. 1861 - 1864

State of Oregon
Patent: US5262568 A1, 1993 ;
US 5262568 A

Cressman
Organic Syntheses, 1947 , vol. 27, p. 56
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Siddiqui, Salimuzzaman; Siddiqui, Bina S.
Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, 1980 , vol. 35, # 8 p. 1049 - 1052

Ahmad, S. S.; Haider, S. I.; Fatima, I.
Synthetic Communications, 1987 , vol. 17, # 15 p. 1861 - 1864

v.Braun; Heider; Mueller
Chemische Berichte, 1918 , vol. 51, p. 279