1. The Potato: Evolution, Biodiversity and Genetic Resources;Hawkes,1990
2. Potatoes and human health;Camire;Crit. Rev. Food Sci. Nutr.,2009
3. The harvested crop;Storey,2007
4. Potato Quality Traits: Variation and Genetics in Ecuadorian Potato Landraces;Cuesta,2013
5. Stastical Year Book 2013,2013