@article{JOLT_2012_22_1_a10,
     author = {M. A. Ben Haddou and M. Boucetta and H. Lebzioui},
     title = {Left-invariant {Lorentzian} {Flat} {Metrics} on {Lie} {Groups}},
     journal = {Journal of Lie Theory},
     pages = {269--289},
     year = {2012},
     volume = {22},
     number = {1},
     doi = {10.5802/jolt.669},
     zbl = {1243.53110},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.669/}
}