@article{FORUM_1997__9_2_141801,
     author = {Suhyoung Choi and Hyunkoo Lee},
     title = {Geometric structures on manifolds and holonomy-invariant metrics.},
     journal = {Forum mathematicum},
     pages = {247--256},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1997},
     zbl = {0870.53023},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1997__9_2_141801/}
}