Prakhar Sharma, Nitin Kumar , Naresh Kumar ,. “Prevalence of Bronchial Asthma Among School Children in Urban and Rural Areas and Associated Risk Factors: A Cross Sectional Study from Western Uttar Pradesh, India”. International Journal of Medical Science and Clinical Invention 4, no. 2 (February 2, 2017). Accessed July 23, 2024. https://valleyinternational.net/index.php/ijmsci/article/view/703.