@article{10_21136_CMJ_1989_102341,
     author = {Je\v{z}ek, Jaroslav and Kepka, Tom\'a\v{s}},
     title = {Varieties of groupoids determined by short linear identities},
     journal = {Czechoslovak Mathematical Journal},
     pages = {644--658},
     publisher = {mathdoc},
     volume = {39},
     number = {4},
     year = {1989},
     doi = {10.21136/CMJ.1989.102341},
     mrnumber = {1018000},
     zbl = {0697.20047},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1989.102341/}
}