Unraveling the Role of Water in the Stereoselective Step of Aqueous Proline-Catalyzed Aldol Reactions - Ribas-Arino - 2012 - Chemistry - A European Journal - Wiley Online Library

http://onlinelibrary.wiley.com/doi/10.1002/chem.201200007/abstract;jsessionid=9DCFB1131B3102DB317C89431E50E253.f01t04