The article you requested is

An Investigation of Water Lithium Concentrations and Rates of Violent Acts in 11 Texas Counties: Can an Association Be Easily Shown?

J Clin Psychiatry 2008;69(2):325-326 [letter]

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Sir: It has been suggested that lithium may be effective in the general treatment of impulsive aggression,1 and quite a bit of literature has demonstrated an association of decreased suicidal behavior with lithium treatment.2 Although there have been some negative studies,3,4 several studies have suggested an association of lower lithium consumption with impulsive and aggressive behavior in humans.​