D.S. Makwama, J.M.Thakkar, R. Majmudar, A. Shnodhi, G. Malviya, and B.M. Patel. “Clonidine Premedication Decreases Hemodynamic Responses to Pin Head-Holder Application During Craniotomy”. Asian Pacific Journal of Health Sciences, vol. 2, no. 3, Sept. 2015, pp. 57-61, doi:10.21276/apjhs.2015.2.3.13.