Геодезическая нормаль к поверхности в
Grozó Stanilov (1964)
Commentationes Mathematicae Universitatis Carolinae
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Grozó Stanilov (1964)
Commentationes Mathematicae Universitatis Carolinae
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István Juhász (1967)
Commentationes Mathematicae Universitatis Carolinae
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Ján Jakubík (1956)
Czechoslovak Mathematical Journal
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