Siqueira LJA, Constantino VRL, Camilo FF, Torresi RM, Temperini MLA, Ribeiro MCC, Izumi CMS.  2014.  Probing the local environment of hybrid materials designed from ionic liquids and synthetic clay by Raman spectroscopy. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 122:469-475.