GÜL, E. 1997. The Hessian tensor on a hypersurface in Euclidean space and Otsuki's lemma. Turkish Journal of Mathematics , vol.21, no.3 , 375-380.

GÜL, E., (1997). The Hessian tensor on a hypersurface in Euclidean space and Otsuki's lemma. Turkish Journal of Mathematics , vol.21, no.3, 375-380.

GÜL, Erdal. "The Hessian tensor on a hypersurface in Euclidean space and Otsuki's lemma," Turkish Journal of Mathematics , vol.21, no.3, 375-380, 1997

GÜL, Erdal. "The Hessian tensor on a hypersurface in Euclidean space and Otsuki's lemma." Turkish Journal of Mathematics , vol.21, no.3, pp.375-380, 1997

GÜL, E. (1997) . "The Hessian tensor on a hypersurface in Euclidean space and Otsuki's lemma." Turkish Journal of Mathematics , vol.21, no.3, pp.375-380.

@article{article, author={Erdal GÜL}, title={The Hessian tensor on a hypersurface in Euclidean space and Otsuki's lemma}, journal={Turkish Journal of Mathematics}, year=1997, pages={375-380} }