GAJENDRA NATH TRIPATHI. Certain Curvature Conditions on $N(k)$-Contact Metric Manifold. International Journal of Mathematics And its Applications, [S. l.], v. 13, n. 4, p. 117–125, 2025. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/1612. Acesso em: 20 apr. 2026.