Chao-Yuan Huang
Physics Physique Fizika 3, 231 (1967) - Published 1 October, 1967
J. C. Slonczewski and V. L. Moruzzi
Physics Physique Fizika 3, 237 (1967) - Published 1 October, 1967
Michael E. Fisher
Physics Physique Fizika 3, 255 (1967) - Published 1 October, 1967