* Hung TH, Wu ML, Su HJ (2000) Identification of alternative hosts of the fastidious bacterium causing citrus greening disease. Journal of Phytopathology, 148(6), 321-326.
------- transient host in which the bacterium exists temporarily and disappears after a few months (5 to 10 months)
* Koizumi M, Prommintara M, Ohtsu Y (1996) Wood apple, Limonia acidissima L.: a new host for the huanglongbing (greening) vector, Diaphorina citri. In International Organization of Citrus Virologists Conference Proceedings (1957-2010) (Vol. 13, No. 13).
------- confirmed host