@article{10_21136_MB_1996_125991,
     author = {Hala\v{s}, Radom{\'\i}r},
     title = {Congruences and ideals on left divisible involutory groupoids},
     journal = {Mathematica Bohemica},
     pages = {269--272},
     publisher = {mathdoc},
     volume = {121},
     number = {3},
     year = {1996},
     doi = {10.21136/MB.1996.125991},
     mrnumber = {1419880},
     zbl = {0879.08003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1996.125991/}
}