@article{IVM_1963_3_a12,
     author = {E. S. Lyapin},
     title = {On maximal, two-sided stable orderings in semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {88--94},
     publisher = {mathdoc},
     number = {3},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1963_3_a12/}
}