Pervaiz, A., W. Alamgir, B. Khan, K. H. Nawaz, I. Ahmad, S. Shafait, and F. Ahmad. “Comparison of Efficacy of Botulinum Toxin Injection and Conventional Oral Drugs for Treatment of Refractory Migraine”. Journal of Health and Rehabilitation Research, vol. 3, no. 2, Dec. 2023, pp. 921-7, doi:10.61919/jhrr.v3i2.241.