Onians, John (2004). Atlas of World Art. Lawrence King Publishing. p. 58. ISBN978-1856693776. Archived from the original on 2 February 2023. Retrieved 16 February 2021. significant pre-figuration of medieval heraldry
Onians, John (2004). Atlas of World Art. Lawrence King Publishing. p. 58. ISBN978-1856693776. Archived from the original on 2 February 2023. Retrieved 16 February 2021. significant pre-figuration of medieval heraldry