@article{IVM_1970_2_a1,
     author = {\`E. A. Golubov},
     title = {Conditions for the finite approximability of naturally totally ordered commutative semigroups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {10--18},
     publisher = {mathdoc},
     number = {2},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1970_2_a1/}
}