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by Mochizuki; Kiyoshi
by Locker, John
by Heinz Otto Cordes
by Suslina, T.; Yafaev, D.
by Edmunds, David; Evans, Des
by Kiyoshi Mochizuki
by Knowles, Ian W.; Lewis, Roger T.; International Conference on Spectral Theory of Differential Operators (1981 : University of Alabama)
by Edmunds, D. E.; Evans, W. D.