Leal LK, A. A. G. Ferreira, G. A. Bezerra, F. J. A.Matos, G. S. B. Viana (May 2000). "Antinociceptive, anti-inflammatory and bronchodilator activities of Brazilian medicinal plants containing coumarin: a comparative study". Journal of Ethnopharmacology. 70 (2): 151–159. doi:10.1016/S0378-8741(99)00165-8. ISSN0378-8741. PMID10771205.
Leal LK, A. A. G. Ferreira, G. A. Bezerra, F. J. A.Matos, G. S. B. Viana (May 2000). "Antinociceptive, anti-inflammatory and bronchodilator activities of Brazilian medicinal plants containing coumarin: a comparative study". Journal of Ethnopharmacology. 70 (2): 151–159. doi:10.1016/S0378-8741(99)00165-8. ISSN0378-8741. PMID10771205.
Leal LK, A. A. G. Ferreira, G. A. Bezerra, F. J. A.Matos, G. S. B. Viana (May 2000). "Antinociceptive, anti-inflammatory and bronchodilator activities of Brazilian medicinal plants containing coumarin: a comparative study". Journal of Ethnopharmacology. 70 (2): 151–159. doi:10.1016/S0378-8741(99)00165-8. ISSN0378-8741. PMID10771205.