Two theorems on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="\[ \left( \varepsilon \right) \]"><mml:mrow><mml:mo>(</mml:mo><mml:mi>ϵ</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>-Sasakian manifolds
International journal of mathematics and mathematical sciences