J.  Gago, Coopman, R. E., Cabrera, H. M., Hermida, C., Molins, A., Conesa, M. A., Galmes, J., Ribas-Carbo, M., and Flexas, J., ?Photosynthesis limitations in three fern species?, Physiologica Plantarum, vol. 149, pp. 599-611, 2013.