Laurence J. Dorr and Dan H. Nicolson, Taxonomic Literature. A selective guide to botanical pubblications and collections with dates, commentaries and types. Suppl. VII: F-Frer, International Association for Plant Taxonomy, A.R.G. Gantner Verlag K.G., Ruggell, Liechtenstein, 2008, [I]-XVIII, 1-469
Appetiti, Emanuela. 2008. [Book review] "Laurence J. Dorr and Dan H. Nicolson, Taxonomic Literature. A selective guide to botanical pubblications and collections with dates, commentaries and types. Suppl. VII: F-Frer, International Association for Plant Taxonomy, A.R.G. Gantner Verlag K.G., Ruggell, Liechtenstein, 2008, [I]-XVIII, 1-469." Journal of the Washington Academy of Sciences, 94, (3), 25–25.