Windham, M. D., and K. M. Pryer. “First Report of Utah Fragile Fern (Cystopteris: Cystopteridaceae) from New Mexico, and New Nomenclatural Combinations in Cystopteris Tenneseensis”. Journal of the Botanical Research Institute of Texas, vol. 16, no. 1, July 2022, pp. 1-7, doi:10.17348/jbrit.v16.i1.1215.