W. Pantupho, K. Deekamwong, S. Prayoonpokarach, J. Wittayakun, and S. Loiha, “Effects of Iron Species on Catalytic Performance for Phenol Hydroxylation of Fe-MCM-41”, KKU Sci. J., vol. 44, no. 1, pp. 175–188, Mar. 2016.