1. (2) M. D'Alessandro, B. Smit, and J. R. Long : “Carbon Dioxide Capture: Prospects for New Materials”, Angew. Chem., Vol. 49, pp. 6058-6082 (2010)
2. (3) J. Y. Hwang, M. Takayasu, F. J. Friedlaender, and G. Kullerud : “Application of magnetic susceptibility gradients to magnetic separation”, J. Appl. Phys., Vol. 55, pp. 2592-2594 (1984)
3. (5) C. De Latour : “Magnetic separation in water pollution control”, IEEE Trans. Magn., Vol. 9, pp. 314-316 (1973)