WASET
    Hari Shankar and  Kshitij Raj and  Priya Keshari and  Pragya Singh,  Prevalence of Headache among Adult Population in Urban Varanasi, India.   journal   = {International Journal of Medical and Health Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2016, vol. 113(5). 281 - 284
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10004559.