Sadeque AJ, Wandel C, He H, Shah S, Wood AJ (2000). “Increased drug delivery to the brain by P-glycoprotein inhibition”. Clin. Pharmacol. Ther.68 (3): 231–7. doi:10.1067/mcp.2000.109156. PMID11014404.
Brooks, BR; Thisted, RA; Appel, SH; Bradley, WG; Olney, RK; Berg, JE; Pope, LE; Smith, RA et al. (2004). “Treatment of pseudobulbar affect in ALS with dextromethorphan/quinidine: a randomized trial”. Neurology63 (8): 1364–70. doi:10.1212/01.wnl.0000142042.50528.2f. PMID15505150.
Sadeque AJ, Wandel C, He H, Shah S, Wood AJ (2000). “Increased drug delivery to the brain by P-glycoprotein inhibition”. Clin. Pharmacol. Ther.68 (3): 231–7. doi:10.1067/mcp.2000.109156. PMID11014404.
Brooks, BR; Thisted, RA; Appel, SH; Bradley, WG; Olney, RK; Berg, JE; Pope, LE; Smith, RA et al. (2004). “Treatment of pseudobulbar affect in ALS with dextromethorphan/quinidine: a randomized trial”. Neurology63 (8): 1364–70. doi:10.1212/01.wnl.0000142042.50528.2f. PMID15505150.