Pieter Nicolaas van Eyck. (n.d.). Wikipedia. Retrieved November 21, 2023, from https://en.wikipedia.org/wiki/Pieter_Nicolaas_van_Eyck
Pieter Nicolaas van Eyck. (n.d.). Wikiwand. Retrieved November 21, 2023, from https://www.wikiwand.com/en/Pieter_Nicolaas_van_Eyck