@article{RSMUP_2018__140__123_0,
     author = {Friedenberg, Stefan and Wolf, Paul},
     title = {A brief journey through extensions of rational groups},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {123--128},
     publisher = {European Mathematical Society Publishing House},
     address = {Zuerich, Switzerland},
     volume = {140},
     year = {2018},
     doi = {10.4171/RSMUP/5},
     mrnumber = {3880214},
     zbl = {1472.20120},
     url = {http://www.numdam.org/articles/10.4171/RSMUP/5/}
}