Kloepper, J. W., Bustamante, E., Polston, J. E., Umaña Villalobos, G., Saborío Pozuelo, F., & Sánchez Chacón, E. (2010). Fern Distortion Syndrome of Leatherleaf Fern in Costa Rica: Symptoms, Incidence, and Severity.

Kloepper, J. W., E. Bustamante, J. E. Polston, Gerardo Umaña Villalobos, Francisco Saborío Pozuelo, och Ethel Sánchez Chacón. Fern Distortion Syndrome of Leatherleaf Fern in Costa Rica: Symptoms, Incidence, and Severity. 2010.

Kloepper, J. W., et al. Fern Distortion Syndrome of Leatherleaf Fern in Costa Rica: Symptoms, Incidence, and Severity. 2010.