Williams 2003, pp. 740–741. Williams, Alan (2003). The Knight and the Blast Furnace: A History of the Metallurgy of Armour in the Middle Ages & the Early Modern Period. History of Warfare Volume 12. Leiden, The Netherlands: Brill Academic Publishers. ISBN978-90-04-12498-1. OCLC49386331.
Williams 2003, p. 55. Williams, Alan (2003). The Knight and the Blast Furnace: A History of the Metallurgy of Armour in the Middle Ages & the Early Modern Period. History of Warfare Volume 12. Leiden, The Netherlands: Brill Academic Publishers. ISBN978-90-04-12498-1. OCLC49386331.
Williams 2003, p. 53. Williams, Alan (2003). The Knight and the Blast Furnace: A History of the Metallurgy of Armour in the Middle Ages & the Early Modern Period. History of Warfare Volume 12. Leiden, The Netherlands: Brill Academic Publishers. ISBN978-90-04-12498-1. OCLC49386331.
Williams 2003, p. 66. Williams, Alan (2003). The Knight and the Blast Furnace: A History of the Metallurgy of Armour in the Middle Ages & the Early Modern Period. History of Warfare Volume 12. Leiden, The Netherlands: Brill Academic Publishers. ISBN978-90-04-12498-1. OCLC49386331.
Williams 2003, p. 331. Williams, Alan (2003). The Knight and the Blast Furnace: A History of the Metallurgy of Armour in the Middle Ages & the Early Modern Period. History of Warfare Volume 12. Leiden, The Netherlands: Brill Academic Publishers. ISBN978-90-04-12498-1. OCLC49386331.
Williams 2003, p. 916. Williams, Alan (2003). The Knight and the Blast Furnace: A History of the Metallurgy of Armour in the Middle Ages & the Early Modern Period. History of Warfare Volume 12. Leiden, The Netherlands: Brill Academic Publishers. ISBN978-90-04-12498-1. OCLC49386331.