@article{article, title  = {{A colourimetric calix[4]pyrrole-4-nitrophenolate based anion sensor}},

 url = {{}},

 year = {{1999}},

 month = {{9}},

 author = {{Gale PA and Twyman LJ and Handlin CI and Sessler JL}},

 journal = {{CHEM COMMUN}},

 issue = {{18}},

 pages = {{1851-1852}},

 note = {{Accessed on 2024/12/26}}}