Immanuel Kant (2015). “THE THREE CRITIQUES: The Critique of Pure Reason, The Critique of Practical Reason & The Critique of Judgment: The Base Plan for Transcendental Philosophy, The Theory of Moral Reasoning and The Critiques of Aesthetic and Teleological Judgment”, p.936, e-artnow
"Why Revive ‘Cosmos?’ Neil DeGrasse Tyson Says Just About Everything We Know Has Changed". Interview With David Freeman, www.huffingtonpost.com. March 4, 2014.