Bonner, Franklin T. (abril de 2008). «Chapter 4 Storage of Seeds»(PDF). Woody Plant Seed Manual,USDA FS Agriculture Handbook 727. National Seed Laboratory, 5675 Riggins Mill Rd, Dry Branch, GA 31020. Consultado el 21 de junio de 2008.
Walters, Chris; Towill, Leigh (2004). «Seeds and Pollen»(PDF). Agricultural Handbook Number 66 The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks. USDA-ARS, National Center for Genetic Resources Preservation
Preservation of Plant Germplasm Research, Fort Collins, CO. Archivado desde el original el 20 de marzo de 2009. Consultado el 21 de junio de 2008.
web.archive.org
Walters, Chris; Towill, Leigh (2004). «Seeds and Pollen»(PDF). Agricultural Handbook Number 66 The Commercial Storage of Fruits, Vegetables, and Florist and Nursery Stocks. USDA-ARS, National Center for Genetic Resources Preservation
Preservation of Plant Germplasm Research, Fort Collins, CO. Archivado desde el original el 20 de marzo de 2009. Consultado el 21 de junio de 2008.