de Pablo, Liberto, et al. “CaK-Clinoptilolite, KNa-Chabazite, KNa-Heulandite, KNa-Erionite and Na-Phillipsite from Tuffaceous Rocks, Province of the Mesa Central, Mexico”. Revista Mexicana De Ciencias Geológicas, vol. 31, no. 1, Feb. 2015, https://rmcg.unam.mx/index.php/rmcg/article/view/267.