@article{SF_1980__21_134456,
     author = {I.E. Kozhukhov},
     title = {On semigroups with minimal or maximal condition on left congruences.},
     journal = {Semigroup forum},
     pages = {337--350},
     publisher = {mathdoc},
     volume = {21},
     year = {1980},
     zbl = {0455.20046},
     url = {http://geodesic.mathdoc.fr/item/SF_1980__21_134456/}
}