Bartnik, Romuald; Wawrynko, Krystyna
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1987 , p. 715 - 716

Zwaard, A. W.; Smits, H. J. E.; Kloosterziel, H.
Recueil: Journal of the Royal Netherlands Chemical Society, 1982 , vol. 101, # 5 p. 187 - 191

Hanack, Michael; Kuehnle, Adolf
Tetrahedron Letters, 1981 , vol. 22, # 32 p. 3047 - 3048