Nuclear Propulsion USS Nautilus (SSN-571) Submarine History 1945–2000: A Timeline of Development Gardiner & Chumbley, pp. 403 "Nuclear-powered ballistic missile submarines – Project 667A".
Truy cập ngày 2 tháng 5 năm 2012.  ^ USS Nautilus (SSN-571) ^ Nuclear Propulsion ^ Submarine History 1945–2000: A Timeline of Development ^ Gardiner & Chumbley, pp. 403 ^ “Nuclear-powered ballistic missile submarines - Project 667A”.