См., к примеру, Catchpole, ‘Incan capital looked to heavenly puma’, ABC Science Online, 14 September 2004, at www.abc.net.au/science/news/stories/s 1198067; Forgione, ‘II Potere dalle Stelle’ Hera 59 (December 2004), стр. 52–58; Magli, Misteri e scoperte dell'archeoastronomia, cmp. 224–230, and Magli, ‘On the astronomical content of the sacred landscape of Cusco in Inka times’, NNJ Architecture and Mathematics 7:2 (2005). Также доступно на сайте rxiv.org/abs/physics/0408037