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Continue to ChatV-direction curve of a surface curve in E^3 - https://avesis.yildiz.edu.tr/yayin/2b9feef2-811f-4a7b-88ba-8f671ea1a430/v-direction-curve-of-a-surface-curve-in-e3
V-direction curve of a surface curve in E^3 - https://avesis.yildiz.edu.tr/yayin/2b9feef2-811f-4a7b-88ba-8f671ea1a430/v-direction-curve-of-a-surface-curve-in-e3