Books

Agro-industrial utilization of cactus pear (2014) http://www.fao.org/docrep/019/a0534e/a0534e.pdf
Utilización agroindustrial del nopal (Spanish version of above, 2006) ftp://ftp.fao.org/docrep/fao/009/a0534s/a0534s00.pdf
Cactus (Ountia spp.) as forage (2001) http://www.fao.org/3/a-y2808e.pdf
El nopal (Opuntia spp.) como forraje (Spanish version of above, 2003) http://www.fao.org/docrep/007/y2808s/y2808s00.htm
Production manual for Beles (Opuntia ficus-indica) in Eritrea (2004) http://www.fao.org/3/contents/83695178-0b55-5dd9-b8de-8ebaffeb0c7e/y5182e00.htm
Cactus (Opuntia spp.) as Forage (http://www.fao.org/docrep/005/y2808e/y2808e00.htm)
Processing and uses of cactus pear and nopal: