References
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- From our discussion it follows that equations (5) and (6) as well as the fundamental equation (6′) of [1] are not obtained by minimizing F given by equation (2) of the same reference, and hence they must be considered incorrect.
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- Yokoyama , H. , Kamei , H. and Kobayashi , S. 1987 . J. appl. Phys. , 61 : 4501
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