RAHMAN ABDEL GADIR ABDEL RAHMAN, A. R. A. ., E. F. ALTAYB ALSAMANI, and N. Y. . MOHAMMED HAROUN. “USING A NEW MATHEMATICAL TECHNIQUE TO FIND NORMAL CURVATURE ON SMOOTH SURFACES IN CYLINDRICAL SYSTEM”. International Journal For Research In Mathematics And Statistics, vol. 9, no. 4, Apr. 2023, pp. 1-7, doi:10.53555/ms.v9i4.2219.