Hirsekorn, Kurt F.; Veige, Adam S.; Marshak, Michael P.; Koldobskaya, Yelena; Wolczanski, Peter T.; Cundari, Thomas R.; Lobkovsky, Emil B. Journal of the American Chemical Society, 2005, vol. 127, # 13 p. 4809 - 4830 doi: 10.1021/ja046180k