Tayebee, Reza, and Fatemeh Cheravi. 2010. “Effect of Protecting Agent Concentration, Catalyst (mol %) and Temperature on the Protection of 2-Propanol Catalyzed by Dodeca-Tungstophosphoric Acid”. Asian Journal of Chemistry 22 (7):5567-74. https://asianpubs.org/index.php/ajchem/article/view/11677.