@article{10_4064_cm_40_2_235_237,
     author = {Zbigniew Olszak},
     title = {Certain property of the {Ricci} tensor on {Sasakian} manifolds},
     journal = {Colloquium Mathematicum},
     pages = {235--237},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1978},
     doi = {10.4064/cm-40-2-235-237},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-40-2-235-237/}
}