Evelyn Kelly, Encyclopedia of Attention Deficit Hyperactivity Disorders, lk 9: "He described individuals who had “quickened responses to sensory experience, but also were less tenaciousness because the soul moves on quickly to the next impression.” Hippocrates attributed this condition to an “overbalance of fire over water” within the blood.", Greenwood Press, 2009, Google'i raamatu veebiversioon (vaadatud 19.02.2017)
Klaus W. Lange, Susanne Reichl, Katharina M. Lange jt, The history of attention deficit hyperactivity disorder, Atten Defic Hyperact Disord., detsember 2010; 2(4): 241–255., avaldatud 30. novembril 2010, doi: 10.1007/s12402-010-0045-8, PMCID: PMC3000907, [31.01.2017]