Cirone, Anthony J. (1991). Simple Steps to Snare Drum, p.30-31. Alfred. ISBN9780757979910. "The purpose of the roll is to sustain the sound over the value of a written note."
core.ac.uk
da Silva, LĂșcia Viana. "The Snare Drum Roll"(PDF). ACADEMY OF MUSIC AND DRAMA, UNIVERSITY OF GOTHENBURG. Retrieved 29 September 2021.