[1]
S. P. Katdare, V. Ramaswamy, and A. V. Ramaswamy, “Preparation of Alumina Pillared Montmorillonite Clays Employing Ultrasonics and Their Catalytic Properties”, Eurasian Chem.-Technol. J., vol. 2, no. 1, pp. 53–58, Feb. 2000.