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Browsing by Author "Petkantschin, B."
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Showing results 1 to 4 of 4
Issue Date
Title
Author(s)
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1957
Elliptische Regelscharen in der zweiachsigen Geometrie
Petkantschin, B.
Bulgarian Academy of Sciences
1954
Isometrie zwischen zwei mongeschen Flächen
Petkantschin, B.
Bulgarian Academy of Sciences
1954
Regelscharen isotroper Geraden im elliptischen Raum
Petkantschin, B.
Bulgarian Academy of Sciences
1956
Regelscharen isotroper Geraden in der zweiachsigen Geometrie
Petkantschin, B.
Bulgarian Academy of Sciences
Showing results 1 to 4 of 4