M. R. R. Massad, E. Massad, and E. A. M. Arcuri, “Study of tissue reaction caused by several concentracions of penicilin G. benzatin in rats”, Rev. Esc. Enferm. USP, vol. 24, no. 1, pp. 31–40, Apr. 1990, doi: 10.1590/0080-6234199002400100031.