Carr, Richard M.; Norman, Richard O. C.; Vernon, John M.
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1980 , p. 156 - 162
Reinhoudt, David N.; Geevers, Jan; Trompenaars, Willem P.; Harkema, Sybolt; Hummel, Gerrit J. van
Journal of Organic Chemistry, 1981 , vol. 46, # 2 p. 424 - 434