Gustafson, Christine. "Studies of the gem-dialkyl effect in the 2,2-dialkyl-1,3-propanediamine chelates of copper (II) and nickel (II) /." Doctoral dissertation, Ohio State University, 1968. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486649251884744Chicago Manual of Style (17th edition)