1. The botany of Citrus and its wild relatives;Swingle,1967
2. The botany of Citrus and its wild relatives of the orange subfamily;Swingle,1943
3. Species Problem in Citrus;Tanaka,1954
4. History and development of the Citrus industry;Webber,1967
5. Biochemistry, taxonomy and evolution of modern cultivated Citrus;Scora,1988