Doktor, Anke; Mach, Martin, (Ed.) (2000). "Galvanoplastik – Geschichte einer Technik aus dem 19. Jahrhundert" [Galvanoplastik - History of a Technology from the 19th Century]. Bronze- und Galvanoplastik: Geschichte – Materialanalyse – Restaurierung(PDF) (Almanca). Landesamt für Denkmalpflege Sachsen. s. 129. 18 Şubat 2021 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Eylül 2021.r eksik |soyadı1= (yardım)
WMF, letter to Mr. Albert Weiblen, Antwerp. "Artistic merits of our reproduction of the famous 'Doors of Paradise'", 14 August 1928. Albert Weiblen Marble & Granite Works Office Records, The Southeastern Architectural Archive 22 Mart 2019 tarihinde Wayback Machine sitesinde arşivlendi., Special Collections Division, Tulane University Libraries.
Doktor, Anke; Mach, Martin, (Ed.) (2000). "Galvanoplastik – Geschichte einer Technik aus dem 19. Jahrhundert" [Galvanoplastik - History of a Technology from the 19th Century]. Bronze- und Galvanoplastik: Geschichte – Materialanalyse – Restaurierung(PDF) (Almanca). Landesamt für Denkmalpflege Sachsen. s. 129. 18 Şubat 2021 tarihinde kaynağından arşivlendi. Erişim tarihi: 29 Eylül 2021.r eksik |soyadı1= (yardım)
WMF, letter to Mr. Albert Weiblen, Antwerp. "Artistic merits of our reproduction of the famous 'Doors of Paradise'", 14 August 1928. Albert Weiblen Marble & Granite Works Office Records, The Southeastern Architectural Archive 22 Mart 2019 tarihinde Wayback Machine sitesinde arşivlendi., Special Collections Division, Tulane University Libraries.