Fuentes clásicas

http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.02.0148%3Abook%3D32%3Achapter%3D17

http://www.twcenter.net/forums/showthread.php?501744-Roman-Legions-vs-Greek-HOPLITE-Phalanx/page14