GMELIN, L. (ed., 1975) : Gmelin Handbuch der Anorganischen Chemie. Vol. C2, Mangan, 31-32.Springer-Verlag.
一国雅巳(1972):無機地球化学,培風館,p.100.
KATSUBE, T. J. (1981) : Pore structure and pore parameters that control the radionuclide transport in crystalline rocks. Prof. Tech. Prog. Int. Powder and Bulk Solid Handling and Processing, 394-409.