Harmonic maps on contact metric manifolds S. Ianus; A.M. Pastore — 1995 Annales mathématiques Blaise Pascal
On sectional and bisectional curvature of the H -umbilical submanifolds. Ianus, S.; Rizza, G.B. — 2002 International Journal of Mathematics and Mathematical Sciences
Complex hypersurfaces of a generalized Hopf manifold. Ianus, S.; Matsumoto, K.; Ornea, L. — 1987 Publications de l'Institut Mathématique. Nouvelle Série