Hewson, Alan T.; Sharpe, David A.; Wadsworth, Alan H.
Synthetic Communications, 1989 , vol. 19, # 11-12 p. 2095 - 2100

Boers, Rutger B.; Randulfe, Yolanda Pazos; Van Der Haas, Hendrikus N. S.; Van Rossum-Baan, Marleen; Lugtenburg, Johan European Journal of Organic Chemistry, 2002 ,  # 13  p. 2094 - 2108