Stabilité de certaines sous-variétés d'une variété riemannienne local produit Gheorghe Pitiş — 1990 Colloquium Mathematicae
Integral submanifolds with closed conformal vector field in Sasakian manifolds. Pitiş, Gheorghe — 2005 The New York Journal of Mathematics [electronic only]
Chern classes of integral submanifolds of some contact manifolds. Pitiş, Gheorghe — 2002 International Journal of Mathematics and Mathematical Sciences