Starcher et al. Journal of Organic Chemistry, 1961 , vol. 26, p. 3568 View citing articles Show Details D'Ans et al. Angewandte Chemie, 1954 , vol. 66, p. 633,634 Show Details Wasil'ew Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1956 , p. 397,399; engl.Ausg.S.385,386