Lớp Indefatigable có trọng lượng choán nước khi đầy tải là 22.100 t (21.800 tấn Anh; 24.400 tấn Mỹ), so với 25.400 t (25.000 tấn Anh; 28.000 tấn Mỹ) của Moltke. Những chiếc trong lớp Indefatigable có đai giáp dày từ 4–6 in (100–150 mm), trong khi đai giáp của Moltke dày 3–11 in (76–279 mm). Xem: Gardiner & Gray 1985, tr. 26, 152. Gardiner, Robert; Gray, Randal biên tập (1985). Conway's All the World's Fighting Ships: 1906–1921. Annapolis: Naval Institute Press. ISBN0-87021-907-3.
R. S. S. Hownam-Meek (2000). “Question 3/99: The Loss of the German Light Cruiser Breslau”. Warship International. Toledo, OH: International Naval Research Organization. XXXVII (1): 92–95. ISSN0043-0374.Quản lý CS1: sử dụng tham số tác giả (liên kết)
Güvenç 2003, tr. 7 Güvenç, Serhat (2003). Barlas, Dilek. “Atatürk's Navy: Determinants of Turkish Naval Policy, 1923–38”. Journal of Strategic Studies. London: Routledge. 26 (1). ISSN1743-937X.
Whitley 1998, tr. 241 Whitley, M. J. (1998). Battleships of World War Two: An International Encyclopedia. Annapolis, Maryland: Naval Institute Press. ISBN1-55750-184-X. OCLC40834665.
Barlas 2002, tr. 152 Barlas, D. Lek (2002). Güvenç, Serhat. “To Build a Navy with the Help of Adversary: Italian-Turkish Naval Arms Trade, 1929–32”. Middle Eastern Studies. London: Taylor & Francis. 38 (4). ISSN1743-7881.
Güvenç 2003, tr. 10 Güvenç, Serhat (2003). Barlas, Dilek. “Atatürk's Navy: Determinants of Turkish Naval Policy, 1923–38”. Journal of Strategic Studies. London: Routledge. 26 (1). ISSN1743-937X.
Güvenç 2003, tr. 19–20 Güvenç, Serhat (2003). Barlas, Dilek. “Atatürk's Navy: Determinants of Turkish Naval Policy, 1923–38”. Journal of Strategic Studies. London: Routledge. 26 (1). ISSN1743-937X.
Barlas 2002, tr. 155 Barlas, D. Lek (2002). Güvenç, Serhat. “To Build a Navy with the Help of Adversary: Italian-Turkish Naval Arms Trade, 1929–32”. Middle Eastern Studies. London: Taylor & Francis. 38 (4). ISSN1743-7881.
Güvenç 2003, tr. 27–28 Güvenç, Serhat (2003). Barlas, Dilek. “Atatürk's Navy: Determinants of Turkish Naval Policy, 1923–38”. Journal of Strategic Studies. London: Routledge. 26 (1). ISSN1743-937X.