1. K. Mori, K. Shiota, N. Urata and H. Ikeuchi. The Surface Oscillation of Liquid Metal in Aluminium Reduction Cells. Light Metals Vol. 1 1976 pp 77–95.
2. N. Urata, K. Mori and H. Dceuchi. Behavior of Bath and Molten Metal in Aluminum Electrolytic Cell. Keikinzoku (Light Metals Japan) Vol. 26, No.11, 1976, pp 573.
3. T. Sele. Instability of the Metal Surface in Electrolytic Alumina Reduction Cells. Met.Trans. B, Vol 8B, 1977, pp 613–618.
4. N. Urata. Magnetics and metal pad instability. Light Metals 1985 pp 581–589.
5. R. Moreau and D. Ziegler. Stability of Aluminum Cells A New Approach. Light Metals 1986 pp 356–364.