Wolf, Robert E.; Hartman, JudithAnn R.; Storey, John M. E.; Foxman, Bruce M.; Cooper, Stephen R.
Journal of the American Chemical Society, 1987 , vol. 109, # 14 p. 4328 - 4335
Lucas, C. Robert; Shuang, Liu; Newlands, Michael J.; Charland, Jean-Pierre; Gabe, Eric J.
Canadian Journal of Chemistry, 1988 , vol. 66, p. 1506 - 1512