↑Completely parsed Cicero: the first oration of Cicero against Catiline by Marcus Tullius Cicero, LeaAnn A. Osburn, Archibald A. Maclardy, আইএসবিএন০-৮৬৫১৬-৫৯০-৪, 2004, "To a Roman the sica seemed the weapon of a murderous ruffian"
↑Cambridge Commentaries on Writings of the Jewish and Christian World 200 BC to AD 200 (Volume 7): The Jewish and Christian World 200 BC to AD 200 by A. R. C. Leaney, 1984, page 114, "...clothes. These men were called sicarii, since their short concealed weapon was a sica. A cognate phenomenon of the times was the appearance of..."
↑The Illyrians (The Peoples of Europe) by John Wilkes, 1996, page 238, "Their principal offensive weapon was the single edged curved-sword, similar to the Greek machaira, a form of weapon that can be traced back to Bronze age times..."
↑The Illyrians (The Peoples of Europe) by John Wilkes, 1996, page 238-239, "Although a short curved sword was used by several peoples around the Mediterranean the Romans regarded the sica as a distinct Illyrian weapon used by the stealthy 'assassin' (sicarius)..."