SWARNKAR, C P, and D SINGH. “Seasonal Variation in Efficacy of Anthelmintics and Prevalence of Anthelmintic Resistance in Gastrointestinal Nematodes of Sheep in Rajasthan”. The Indian Journal of Animal Sciences, vol. 82, no. 5, May 2012, https://epubs.icar.org.in/index.php/IJAnS/article/view/17671.