Monath, Wolfgang (1966). "Gryphius, Andreas" (in German), in: Neue Deutsche Biographie. Vol. 7. Berlin: Duncker & Humblot. p. 242–246; here: p. 242. Online version retrieved 2017-05-28. The entry begins with information about Gryphius's family in abbreviated form: "V[ater] Paul (1560–1621) ... (E[nkel] d[es] Pastors Peter in Heringen, der seinen Namen Greif latinisierte)" [English translation: "father Paul (1560–1621) ... (grandson of Pastor Peter in Heringen, who Latinized his name, which was 'Greif')"].
Palm, Hermann (1879). "Gryphius, Andreas" (in German), in: Allgemeine Deutsche Biographie. Vol. 10. Leipzig: Duncker & Humblot. p. 73–82; here: pp. 74–75. Online version retrieved 2017-05-28.