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Differential Geometry of Manifolds
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Differential Geometry of Manifolds
1990 №21
О двойных линиях пары (f1 Δ2) в евклидовом пространстве E3
Differential Geometry of Manifolds
1990 №21
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О двойных линиях пары (f1 Δ2) в евклидовом пространстве E3
