Sustaining Members Society of Motion Picture and Television Engineers:High-Definition Electronic Production — Introduction and Overview. In: SMPTE Journal. Band98, Nr.11, 7.Juli 1989, ISSN0036-1682, S.443, doi:10.5594/j03978: „a compromise aspect ratio to accommodate both traditional television programs (4:3) and motion pictures (2.35:1) in an acceptable manner“
Sustaining Members Society of Motion Picture and Television Engineers:High-Definition Electronic Production — Introduction and Overview. In: SMPTE Journal. Band98, Nr.11, 7.Juli 1989, ISSN0036-1682, S.443, doi:10.5594/j03978: „a compromise aspect ratio to accommodate both traditional television programs (4:3) and motion pictures (2.35:1) in an acceptable manner“