1.https://vcahospitals.com/know-your-pet/ear-infections-in-dogs-otitis-externa
2.https://www.petmd.com/dog/conditions/ears/c_multi_otitis_externa_and_otitis_media
3.https://www.sciencedirect.com/science/article/pii/S0195561603001578
4.https://onlinelibrary.wiley.com/doi/full/10.1111/j.1439-0442.2007.00996.x
5.https://www.petmd.com/dog/general-health/10-signs-your-dog-has-yeast-infection
6.http://www.thedrakecenter.com/services/dogs/blog/guide-canine-ear-infections
7.http://www.akc.org/content/health/articles/tips-preventing-ear-infections/
8.https://www.whole-dog-journal.com/issues/7_6/features/Canine-Ear-Infections_5642-1.html
9.https://www.banfield.com/pet-healthcare/additional-resources/article-library/everyday-care/do-i-need-to-clean-my-dog-s-ears
10.https://www.thespruce.com/how-to-clean-your-dogs-ears-1118393
11.http://dogsaholic.com/care/homemade-dog-ear-cleaner.html
12.http://dogtime.com/dog-health/55811-hydrogen-peroxide-ears-good-dog