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A. Altin       Harmonic curvatures of null curves and the null helix in R_1^{m+2}       Int. Math. Forum, Vol. 2, 2007, no. 21-24, 1111-1118       http://dx.doi.org/10.12988/imf.2007.07096
Copyright © 2007 A. Altin. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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