@article{10_21136_CMJ_2019_0342_18,
     author = {Haji-Badali, Ali and Zaeim, Amirhesam},
     title = {Semi-symmetric four dimensional neutral {Lie} groups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {393--410},
     publisher = {mathdoc},
     volume = {70},
     number = {2},
     year = {2020},
     doi = {10.21136/CMJ.2019.0342-18},
     mrnumber = {4111850},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2019.0342-18/}
}