Tower of Shadows (English Wikipedia)

Sanderson, Peter (March 7, 2006). "Steranko and Simon: Back to Back". Publishers Weekly. PW Comics Week (column). Dead link; pertinent passages reprinted at "Frightening First Fridays: Tower of Shadows #1". Diversions of the Grooovy Kind (fan site). October 31, 2008. Archived from the original on November 27, 2010.

kenmeyerjr.com

Steranko in Groth, Gary, "An Interview with THE Artist ... Jim Steranko: '...local boy makes good'" (PDF). Fantastic Fanzine (11) 1970, n.d.; indicia reads, "Next issue due out June 20.". pp. 11–12. Archived from the original (PDF) on July 13, 2011. Via Meyer, Ken Jr. (ed.). "Ink Stains 23: Fantastic Fanzine 11 (October 1, 2010)". ComicAttack.net. Archived (PDF) from the original on July 13, 2011.

Roach, David A. (May 2001). "Shadows and The Darkness". Comic Book Artist. No. 13. Via OhTheHorror.com. Archived from the original on February 15, 2008.

Sanderson, Peter (March 7, 2006). "Steranko and Simon: Back to Back". Publishers Weekly. PW Comics Week (column). Dead link; pertinent passages reprinted at "Frightening First Fridays: Tower of Shadows #1". Diversions of the Grooovy Kind (fan site). October 31, 2008. Archived from the original on November 27, 2010.

Roach, David A. (May 2001). "Shadows and The Darkness". Comic Book Artist. No. 13. Via OhTheHorror.com. Archived from the original on February 15, 2008.
Sanderson, Peter (March 7, 2006). "Steranko and Simon: Back to Back". Publishers Weekly. PW Comics Week (column). Dead link; pertinent passages reprinted at "Frightening First Fridays: Tower of Shadows #1". Diversions of the Grooovy Kind (fan site). October 31, 2008. Archived from the original on November 27, 2010.
Steranko in Groth, Gary, "An Interview with THE Artist ... Jim Steranko: '...local boy makes good'" (PDF). Fantastic Fanzine (11) 1970, n.d.; indicia reads, "Next issue due out June 20.". pp. 11–12. Archived from the original (PDF) on July 13, 2011. Via Meyer, Ken Jr. (ed.). "Ink Stains 23: Fantastic Fanzine 11 (October 1, 2010)". ComicAttack.net. Archived (PDF) from the original on July 13, 2011.