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Continue to ChatLightlike hypersurfaces with planar normal sections in R₁⁴ - https://dergipark.org.tr/en/pub/cfsuasmas/issue/49221/473923
Lightlike hypersurfaces with planar normal sections in R₁⁴ - https://dergipark.org.tr/en/pub/cfsuasmas/issue/49221/473923