The Apex Theory is the second extended play by the American rock band Mt. Helium, formerly The Apex Theory. Released on October 9, 2001, it was the band's first release on a major label.[1]
^Wilson, MacKenzie. "The Apex Theory". Allmusic. Retrieved 15 December 2008. Iannini, Tommaso (2003). "The Apex Theory". Nu metal (in Italian). Giunti. pp. 22–23. ISBN88-09-03051-6.