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Baltic Region
Slovo.ru
Kantian Journal
Surgical Practice
Differential Geometry of Manifolds
Vestnik
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Differential Geometry of Manifolds
1990 №21
К вопросу о фокальных образах многообразий коник в четырехмерном проективном пространстве
Differential Geometry of Manifolds
1990 №21
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К вопросу о фокальных образах многообразий коник в четырехмерном проективном пространстве
