@book{ BA04873403,
 author = "Struik, Dirk Jan",
 title = "Lectures on classical differential geometry",
 publisher = "Dover Publications",
 year = "1988",
 edition = "2nd ed",
 series = "Dover books on advanced mathematics",
 number = "",
 URL = "https://ci.nii.ac.jp/ncid/BA04873403"
}
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