@article{PIM_1996_N_S_60_74_a11,
     author = {Ryszard Deszcz and P. Verheyen and L. Verstraelen},
     title = {On {Some} {Generalized} {Einstein} {Metric} {Conditions}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {108 },
     publisher = {mathdoc},
     volume = {_N_S_60},
     number = {74},
     year = {1996},
     zbl = {0947.53024},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1996_N_S_60_74_a11/}
}