Burger, Ulrich; Erne-Zellweger, Dominique; Sledeski, Adam W.; Schmidlin, Serge
Tetrahedron Letters, 1989 , vol. 30, # 21 p. 2797 - 2800

Burger, Ulrich; Gmuender, Christian; Schmidlin, Serge; Bernardinelli, Gerald
Helvetica Chimica Acta, 1990 , vol. 73, # 6 p. 1724 - 1729