Dev
Journal of the Indian Chemical Society, 1955 , vol. 32, p. 325,330

Pfau; Plattner
Helvetica Chimica Acta, 1936 , vol. 19, p. 858,870
Helvetica Chimica Acta, 1940 , vol. 23, p. 768,784

Lyall, Catherine L.; Uosis-Martin, Mario; Lowe, John P.; Mahon, Mary F.; Pantos, G. Dan; Lewis, Simon E.
Organic and Biomolecular Chemistry, 2013 , vol. 11, # 9 p. 1468 - 1475