Mitchell, Michael. "Studies in benzocyclobutene chemistry : Diels-Alder adducts of benzocyclobutadiene and l-mono- and 1,2-disubstituted benzocyclobutenes /." Doctoral dissertation, Ohio State University, 1960. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486479798666279Chicago Manual of Style (17th edition)