Baccolini, Graziano; Bartoli, Giuseppe; Marotta, Emanuela; Todesco, Paolo E.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1983 , # 11 p. 2695 - 2697

Prochazka, Michal P.; Carlson, Rolf
Acta Chemica Scandinavica, 1989 , vol. 43, # 7 p. 651 - 659