Seitz, Lee K. (January 13, 2000). "Bill Mantlo". Rom Spaceknight Revisited! (fan site). Archived from the original on May 17, 2011. Retrieved February 2, 2009.
Coffin, Bill (November 7, 2011). "Tragic Tale". National Underwriter Life & Health. Archived from the original on January 3, 2012. Retrieved May 23, 2012.
Seitz, Lee K. (January 13, 2000). "Bill Mantlo". Rom Spaceknight Revisited! (fan site). Archived from the original on May 17, 2011. Retrieved February 2, 2009.
Coffin, Bill (November 7, 2011). "Tragic Tale". National Underwriter Life & Health. Archived from the original on January 3, 2012. Retrieved May 23, 2012.