Murillo, Olman, and Oscar Rocha. 1999. “Gene Flow and Geographic Variation in Natural Populations of <i>Alnus acuminata</i> Ssp. Arguta (Fagales: Betulaceae) in Costa Rica and Panama”. Revista De Biología Tropical 47 (4):739–753. https://doi.org/10.15517/rbt.v47i4.19231.