Jansen-González, S., Rojas, M., Ramírez Valerio, D., Constantino, L., García Jiménez, F., & Hanson, P. E. (2019). Another species of Quadrastichus (Hymenopera; Eulophidae; Tetrastichinae) attacking Erythrina (Fabaceae) in the Neotropics: A report from Costa Rica.

Jansen-González, Sergio, Mainor Rojas, Daniel Ramírez Valerio, Luis Constantino, Fiorella García Jiménez, y Paul E. Hanson. Another Species of Quadrastichus (Hymenopera; Eulophidae; Tetrastichinae) Attacking Erythrina (Fabaceae) in the Neotropics: A Report From Costa Rica. 2019.

Jansen-González, Sergio, et al. Another Species of Quadrastichus (Hymenopera; Eulophidae; Tetrastichinae) Attacking Erythrina (Fabaceae) in the Neotropics: A Report From Costa Rica. 2019.