Russon, Allien R. (n.d.), «Shorthand», Encyclopædia Britannica Online, consultado em 1 de agosto de 2016
doi.org
dx.doi.org
Bankston, Zach (2012). «Administrative Slavery in the Ancient Roman Republic: The Value of Marcus Tullius Tiro in Ciceronian Rhetoric». Rhetoric Review. 31 (3): 203–218. doi:10.1080/07350198.2012.683991
Guénin, Louis-Prosper; Guénin, Eugène (1908). Histoire de la sténographie dans l'antiquité et au moyen-âge; les notes tironiennes (em francês). Paris: Hachette et cie. OCLC301255530
Mitzschke, Paul Gottfried; Lipsius, Justus; Heffley, Norman P. (1882). Biography of the father of stenography, Marcus Tullius Tiro; together with the Latin letter, "De notis", concerning the origin of shorthand. Brooklyn, New York: [s.n.] OCLC11943552
Kopp, Ulrich Friedrich; Bischoff, Bernhard (1965). Lexicon Tironianum (em alemão). Osnabrück: Zeller. OCLC2996309