Puts, G., and P. Crouse. “The Effect of Copper- and Nickel Based Catalysts on the Pyrolysis of Polytetrafluoroethylene”. Suid-Afrikaans Tydskrif Vir Natuurwetenskap En Tegnologie / <i>South African Journal of Science and Technology</I&gt;, Vol. 33, no. 1, July 2014, p. 2 bladsye, doi:10.4102/satnt.v33i1.1208.