Ginting, Nahitma, et al. “RELAXATION ACTIVITY OF TETANUS (LEEA AEQUATA L.) LEAF ETHANOLIC EXTRACT ON GUINEA PIG ISOLATED TRACHEA”. Asian Journal of Pharmaceutical and Clinical Research, vol. 11, no. 13, Apr. 2018, pp. 24-27, doi:10.22159/ajpcr.2018.v11s1.26557.