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- [4] CUTOFF FREQUENCIES OF SINGLE-MODE OPTICAL FIBERS WITH INNER CLADDING RADIOTEKHNIKA I ELEKTRONIKA, 1988, 33 (06): : 1132 - 1136
- [7] DETERMINING THE CUTOFF WAVELENGTH IN SINGLE-MODE FIBERS PISMA V ZHURNAL TEKHNICHESKOI FIZIKI, 1986, 12 (13): : 780 - 783