H. C. Kalita and C. C. Bordoloi, “Distribution of clara cells in trachea, bronchus and bronchioles of mithun, yak and zebu”, Indian J of Anim Sci, vol. 75, no. 7, Jul. 2005, Accessed: Oct. 26, 2025. [Online]. Available: https://epubs.icar.org.in/index.php/IJAnS/article/view/8169