^Música Poética: Musical-Rhetorical Figures in German Baroque Music Dietrich Bartel - 1997- Page 246 0803212763 "The first musical reference to the ellipsis is already encountered in the sixteenth century, when Eucharius Hoffmann uses the term to describe a transgression of the normal ambitus of a mode."
^Music Theory from Zarlino to Schenker: A Bibliography and Guide David Damschroeder, David Russell Williams - 1990 -- Page 122 0918728991 "Eucharius Hoffmann's Musicae practicae praecepta (1572) retained the traditional eight-mode system, but his more important Doctrina de tonis seu modis musicis (1582) reveals the strong influence of GLAREAN.."