Balza, U., and R. C. de Gouvenain. “Twenty-Year Assessment of Lignum-Vitae (Guaiacum Sanctum, Zygophyllaceae) in the Palo Verde National Park of Costa Rica”. Revista De Biología Tropical, vol. 67, no. 6, Dec. 2019, pp. 1269–1277, doi:10.15517/rbt.v67i6.38338.