Mefenamic acid anti-inflammatory drug: probing its polymorphs by vibrational (ir and raman) and solid-state nmr spectroscopies - Cunha, Vanessa Roberta Rodrigues da; Izumi, Celly Mieko Shinohara; Petersen, Philippe Alexandre Divina; Magalhães, Alviclér; Temperini, Márcia Laudelina Arruda; Petrilli, Helena Maria; Constantino, Vera Regina Leopoldo (Journal of Physical Chemistry B, 2014)