References:

1.    Demay, R. The Art and Science of Cytopathology. 1996.

2.    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3307464/

3     https://www.dovemed.com/diseases-conditions/oncocytic-carcinoma-salivary-gland/

4.    https://link.springer.com/chapter/10.1007/978-0-387-76623-2_8

5.    https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1564019/