Shell closure of two cavitands forms carcerand complexes with components of the medium as permanent guestsDonald J. Cram, Stefan Karbach, Young Hwan Kim, Lubomir Baczynskyj, Gregory W. KallemeynJ. Am. Chem. Soc.; 1985; 107(8); 2575-2576. doi:10.1021/ja00294a076
Constrictive binding of large guests by a hemicarcerand containing four portals Mimi L. C. Quan, Donald J. Cram J. Am. Chem. Soc.; 1991; 113(7); 2754-2755. doi:10.1021/ja00007a060
