https://www.pulsus.com/scholarly-articles/embryological-basis-of-bilateral-double-parotid-ducts-a-rare-anatomical-variation.html
Embryological basis of bilateral double parotid ducts: a rare anatomical variation
Embryological basis of bilateral double parotid ducts: a rare anatomical variation, Rajesh B. ASTIK, Urvi H. DAVE
parotid ductsanatomical variationembryologicalbasisbilateral