Francisco, Cosme G.; Melian, Daniel; Salazar, Jose A.; Suarez, Ernesto
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1982 , p. 923 - 930

Dave, Vinod; Stothers, J. B.; Warnhoff, E. W.
Canadian Journal of Chemistry, 1980 , vol. 58, p. 2666 - 2678