V.V. Raman (2012), Hinduism and Science: Some Reflections, Zygon - Journal of Religion and Science, 47(3): 549–574, Quote (page 557): "Aside from nontheistic schools like the Samkhya, there have also been explicitly atheistic schools in the Hindu tradition. One virulently anti-supernatural system is/was the so-called Carvaka school.", doi:10.1111/j.1467-9744.2012.01274.x
Bill Cooke (2005), Dictionary of Atheism, Skepticism, and Humanism, ISBN978-1591022992, page 84;
For a general discussion of Cārvāka and other atheistic traditions within Hindu philosophy, see Jessica Frazier (2014), Hinduism in The Oxford Handbook of Atheism (Editors: Stephen Bullivant, Michael Ruse), Oxford University Press, ISBN978-0199644650, pages 367-378
