Murillo, O. and Rocha, O. (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), pp. 739–753. doi: 10.15517/rbt.v47i4.19231.