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"The effect of niaprazine on some common sleep disorders in children. A double-blind clinical trial by means of continuous home-videorecorded sleep". Child's Nervous System. 7 (6): 332-5. October 1991. doi:10.1007/bf00304832. PMID1837245.
"Niaprazine vs chlordesmethyldiazepam in sleep disturbances in pediatric outpatients". Pharmacological Research. 25 Suppl 1: 83-4. 1992. doi:10.1016/1043-6618(92)90551-l. PMID1354861.