5, Chapter 5==External links==* Effects of pollination on Citrus plants Pollination of Citrus by Honey Bees* Citrus Research and Education Center of IFAS (largest citrus research center in world)* Citrus Variety Collection by the University of California* Citrus (Mark Rieger, Professor of Horticulture, University of Georgia)* Fundecitrus – Fund for Citrus Plant Protection is an organization of citrus Brazilian producers and processors.
* Citrus fruits из университета Парди Purdue University* Таксономия цитрусовых (abstract)* Латинские названия растений* Citrus (Mark Rieger, Professor of Horticulture, University of Georgia)* Sorting Citrus names* Fundecitrus — Fund for Citrus Plant Protection is an organization of citrus Brazilian producers and processors.