1.https://vcahospitals.com/know-your-pet/dealing-with-drooling
2. Lorenz, MD; Neer, TM; DeMars, P; Small Animal Medical Diagnosis, pg 197-198
3.http://www.dogster.com/dogs-101/think-you-know-dog-drool-meet-these-drooly-dog-breeds
4.https://www.dogslife.com.au/dog-news/dog-health/drooling-dogs
5.https://www.petmd.com/dog/conditions/mouth/c_multi_ptyalism
6. https://wagwalking.com/condition/ptyalism
7.http://www.vetstreet.com/our-pet-experts/why-does-my-dog-drool-so-much
8.https://www.dovepress.com/pathophysiology-and-pathological-findings-of-heatstroke-in-dogs-peer-reviewed-article-VMRR