Knoelker, Hans-Joachim; Froehner, Wolfgang Tetrahedron Letters, 1997 , vol. 38, # 23 p. 4051 - 4054 Title/Abstract Full Text View citing articles Show Details Knoelker, Hans-Joachim; Froehner, Wolfgang Journal of the Chemical Society - Perkin Transactions 1, 1998 , # 2 p. 173 - 175