@article{10_21136_MB_2008_140618,
     author = {Misiak, Aleksander and Stasiak, Eugeniusz},
     title = {$G$-space of isotropic directions and $G$-spaces of $ \varphi $-scalars with $G=O( n,1,\mathbb R) $},
     journal = {Mathematica Bohemica},
     pages = {289--298},
     publisher = {mathdoc},
     volume = {133},
     number = {3},
     year = {2008},
     doi = {10.21136/MB.2008.140618},
     mrnumber = {2494782},
     zbl = {1199.53034},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/articles/10.21136/MB.2008.140618/}
}