Reed, Bruce Cameron (2019). Keplerian ellipses : the physics of the gravitational two-body problem. Morgan & Claypool Publishers, Institute of Physics. San Rafael [California] (40 Oak Drive, San Rafael, CA, 94903, US). ISBN978-1-64327-470-6. OCLC1104053368.{{cite book}}: CS1 maint: location (link) CS1 maint: location missing publisher (link)