1. Sessler JL, Gale PA, Cho W-S (2006) Anion receptor chemistry. Royal Society of Chemistry, Cambridge
2. Steed JW, Turner DR, Wallace KJ (2007) Core concepts in supramolecular chemistry and nanochemistry. Wiley, Chichester
3. Kaufmann DE, Otten A (1994) Angew Chem Int Ed 33:1832–1834
4. Shur VB, Tikhonova IA (2004) In: Atwood JL, Steed JW (eds) Encyclopedia of supramolecular chemistry. Marcel Dekker Inc, New York
5. Wuest JD (1999) Acc Chem Res 32:81–89