1. K. Grjotheim, C. Krohn, M. Malinovský, K. Matiašovsky, and J. Thonstad, Aluminium Electrolysis, Fundamentals of the Hall-Héroult Process, 2-nd ed. (Aluminium-Verlag, Düsseldorf, Germany, 1982).
2. J. Thonstad, P. Fellner, G. M. Haarberg, J. Híve, H. Kvande, Ĺ. Sterten, Aluminium Electrolysis, Fundamentals of the Hall Héroult Process, 3rd ed. (Aluminium-Verlag, Düsseldorf, Germany, 2001).
3. Transitions in crystal structure of cryolite and related fluorides
4. High-temperature powder synchrotron diffraction studies of synthetic cryolite Na3AlF6