* Faure, G. and Mensing, T., Isotopes: Principles and Applications, Wiley & Sons, 2005.
* Faure, G. and Mensing, T., Isotopes: Principles and Applications, Wiley & Sons, 2005.
* Walker, M., Quarternary Dating Methods, Wiley & Sons, 2005.
* Walker, M., Quarternary Dating Methods, Wiley & Sons, 2005.
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* Walker, Tas., [http://creationontheweb.com/content/view/1608/ Radioactive decay rate depends on chemical environment], ''Journal of Creation'' 14(1):4–5, April 2000.
* Walker, Tas., [http://creationontheweb.com/content/view/470 The way it really is: little-known facts about radiometric dating], ''Creation'' 24(4):20–23, September 2002.
* Walker, Tas., [http://creationontheweb.com/content/view/470 The way it really is: little-known facts about radiometric dating], ''Creation'' 24(4):20–23, September 2002.