"Elephant's Toothpaste"(PDF). University of Utah Chemistry Demonstrations. University of Utah. Archived(PDF) from the original on 23 December 2014. Retrieved 21 March 2014.
"Elephant's Toothpaste"(PDF). University of Utah Chemistry Demonstrations. University of Utah. Archived(PDF) from the original on 23 December 2014. Retrieved 21 March 2014.