↑Schneider, JS (July 2003). "The Subtype-Selective Nicotinic Acetylcholine Receptor Agonist SIB-1553A Improves Both Attention and Memory Components of a Spatial Working Memory Task in Chronic Low Dose 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine-Treated Monkeys". Journal of Pharmacology and Experimental Therapeutics. 306 (1): 401–6. doi:10.1124/jpet.103.051912. PMID12721323. S2CID7060934.