Encapsulation of methane and other small molecules in a self-assembling superstructure N Branda, R Wyler, J Rebek Jr Science 04 Mar 1994: Vol. 263, Issue 5151, pp. 1267-1268 DOI: 10.1126/science.8122107 http://science.sciencemag.org/content/263/5151/1267 email: [email protected]/* */ thanks