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3. English translation: J. Math. Sci., 222, No. 1, 1-25 (2017), https://doi.org/10.1007/s10958-017-3278-7
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5. English translation: USSR Comput. Math. & Math. Phys., 9, No. 2, 76-106 (1969), https://doi.org/10.1016/0041-5553(69)90095-0