On equivalence of third order linear differential operators on two-dimensional manifolds
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1973 ◽
Vol 41
(1)
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pp. 137-137
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1975 ◽
Vol 27
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pp. 138-145
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2020 ◽
Vol 41
(12)
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pp. 2473-2481
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2004 ◽
Vol 296
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pp. 403-409
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1974 ◽
Vol 51
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pp. 221-234
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