@article{CMUC_1992__33_2_a5,
     author = {Sekigawa, Kouei and Suga, Hiroshi and Vanhecke, Lieven},
     title = {Four-dimensional curvature homogeneous spaces},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {261--268},
     publisher = {mathdoc},
     volume = {33},
     number = {2},
     year = {1992},
     mrnumber = {1189656},
     zbl = {0763.53043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1992__33_2_a5/}
}