The Nuttall Encyclopedia
An ecclesiastical council held at Constantinople in 692, composed chiefly of Eastern bishops, and not reckoned among the councils of the Western Church.
Wood, James, ed. Entry for 'Quinisext'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/q/quinisext.html. Frederick Warne & Co Ltd. London. 1900.