Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), , p. 522 - 528

Motawia, Mohammed S.; Joergensen, Per T.; Larnkjaer, Anni; Pedersen, Erik B.; Nielsen, Claus
Monatshefte fuer Chemie, 1993 , vol. 124, # 1 p. 55 - 64