Locke, Charles. "The conditional distribution of 1/2[absolute value of]x₁-x₂ given 1/2(x₁+x₂) and a test for normality /." Doctoral dissertation, Ohio State University, 1973. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486745274151693Chicago Manual of Style (17th edition)