Tangent bundles of quasi-constant holomorphic sectional curvatures. Bejan, C.L.; Oproiu, V. — 2006 Balkan Journal of Geometry and its Applications (BJGA)
Tangent sphere bundles of natural diagonal lift type. Druţă, S.L.; Oproiu, V. — 2010 Balkan Journal of Geometry and its Applications (BJGA)