Lee, Darren S., Elsegood, Mark R.J., Redshaw, Carl, Zhan, Shuzhong, "Two related lithium calixarene complexes, [p-tert-butyl-calix[4]arene(OMe) (OH)2(OLi)]2·4MeCN and p-tert-butyl-calix[4] arene(OH)2(OLi)[OLi(NCMe)2]2·8MeCN, determined using synchrotron radiation", Acta Crystallographica Section C: Crystal Structure Communications, 2009