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«Piracetam and levetiracetam, two pyrrolidone derivatives, exert antidystonic activity in a hamster model of paroxysmal dystonia». European Journal of Pharmacology391 (3): 251-4. March 2000. PMID10729365. doi:10.1016/S0014-2999(00)00105-9.
«Design and study of piracetam-like nootropics, controversial members of the problematic class of cognition-enhancing drugs». Current Pharmaceutical Design8 (2): 125-38. 2002. PMID11812254. doi:10.2174/1381612023396582.