Publication Details (including relevant citation information): J. Chin, C. Walsdorff, B.R. Stranix, J. Oh, H.J. Chung, S. Park, K. Kim, S.Y. Jong, S.H.Park, A. Ghoussoub, S.J. Lee; (2002)Tuning and Dissecting Electronic and Steric effects in Ammonium Receptors: Nonactin vs Artificial Receptors , J. Am. Chem. Soc. (124) pp5374-5379.