Krause, Fran (January 28, 2009). "Animation in Hard Times". frankrause.com. Archived from the original on November 1, 2014. Retrieved October 31, 2014.
Fran Krause (August 20, 2008). "Rooftop Signal Film". frankrause.com. Archived from the original on November 1, 2014. Retrieved October 31, 2014.
Krause, Fran (January 28, 2009). "Animation in Hard Times". frankrause.com. Archived from the original on November 1, 2014. Retrieved October 31, 2014.