Pirrung, Frank O. H.; Steeman, Werner J. M.; Hiemstra, Henk; Speckamp, W. Nico; Kaptein, Bernard; Boesten, Wilhelmus H. J.; Schoemaker, Hans E.; Kamphuis, Joban
Tetrahedron Letters, 1992 , vol. 33, # 35 p. 5141 - 5144