(en) Fomenko, A. T.; Vi︠a︡cheslavovich, Vladimir Kalashnikov; Nosovskiĭ, Gleb Vladimirovich, Geometrical and statistical methods of analysis of star configurations : dating Ptolemy's Almagest, Boca Raton, CRC Press, (ISBN978-0-8493-4483-1, LCCN93012834), p. 215