@article{articleb718142e,
title   = {Analgesic activity of a triterpene isolated from scoparia dulcis l. (Vassourinha)},
author = {Freire, S M and Torres, L M B and Roque, N F and Souccar, C and Lapa, A J},
year = {1991},
doi = {10.1590/s0074-02761991000600034},
journal   = {Memorias do Instituto Oswaldo Cruz}
}