Open Access
1967 A theory of ruled surfaces in $E^{4}$
Tominosuke Ôtsuki, Katsuhiro Shiohama
Kodai Math. Sem. Rep. 19(3): 370-380 (1967). DOI: 10.2996/kmj/1138845442
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Vol.19 • No. 3 • 1967
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