Taheri, M., A. Mirkheshti, A. Manafi Rasi, and Y. Adili. “Comparing the Use of Memantine With Dextromethorphan and Placebo to Reduce Pain before Orthopedic Surgery”. Journal of Cellular & Molecular Anesthesia, vol. 2, no. 4, Dec. 2017, pp. 157-64, doi:10.22037/jcma.v2i4.18182.