R. Devaney. Discrete Mathematics in the Schools, volume 36 of DIMACS Series in Discrete Mathematics and Theoretical Computer Science, page 239-253. DIMACS/AMS, (1992)
C. Bauer, and J. Devaney. Mediale Stimmentwürfe: Perspectives of media voice designs, volume 7 of Schriftenreihe zur digitalen Gesellschaft NRW, kopaed Verlag, Munich, Germany, (April 2022)