v. (Copenhagen, 1897–1905)**A.D. Jørgensen, "Peter Schumacher Griffenfeld" (Copenhagen, 1893–1894)**O. Vaupell, "Rigskansler Grev Griffenfeld" (Copenhagen, 1880–1882)**Bain, "Scandinavia", cap.
v. (Copenhagen, 1897—1905);* A.D. Jørgensen, "Peter Schumacher Griffenfeld" (Copenhagen, 1893—1894);* O. Vaupell, "Rigskansler Grev Griffenfeld" (Copenhagen, 1880—1882);* Bain, "Scandinavia", cap.