«Cannabis Effects». Erowid. [Consulta: 15 febrer 2008]. «Time sense altered: cars seem like they are moving too fast, time dilation and compression are common at higher doses.»
Sunrise. «Unified Field Theory: A new interpretation» (PDF). Chapter 2—The Development of the Unified Field Theory, pg. 31. Sunrise Information Services, 2008. Arxivat de l'original el 2009-09-13. [Consulta: 25 juliol 2009].
Sunrise. «Unified Field Theory: A new interpretation» (PDF). Chapter 2—The Development of the Unified Field Theory, pg. 31. Sunrise Information Services, 2008. Arxivat de l'original el 2009-09-13. [Consulta: 25 juliol 2009].