Adedigba JA, Idowu BM, Hermans SP, Okwori OF, Onigbinde SO, Oluwadiya KS, Amoako AA, Weidenhaft MC.  Fabella and patella variants: radiographic prevalence, distribution and clinical relevance in a population of black african descent.  Anat Cell Biol 2021;54:184-192.  
https://doi.org/10.5115/acb.20.217