Greuter, W., McNeill, J. , Barrie, F. R., Burdet, H. M., Demoulin, V., Filgueiras, T. S., Nicolson, D. H., Silva, P. C., Skog, J. E., Trehane, P., Turland, N. J., Hawksworth, D. L. (Ed. & Compilers): International Code of Botanical Nomenclature (Saint Louis Code) adopted by the Sixteenth International Botanical Congress St. Louis, Missouri, July - August 1999. – Koenigstein, 2000.
Greuter, W., Barrie, F. R., Burdet, H. M., Chaloner, W. G., Demoulin, V. , Hawksworth, D. L, Jørgensen, P. M., Nicolson, D. H., Silva, P. C., Trehane, P., McNeill, J. (Ed. & Compilers): International Code of Botanical Nomenclature (Tokyo Code) adopted by the Fifteenth International Botanical Congress, Yokohama, August-September 1993. – Koenigstein, 1994.