Koopman, Stove and Hume - MORTENSEN, C. (Periodicals Archive Online (PAO), 1977)
http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4251-1977-055-00-000020
Keywords: CA-CI