@article{IVM_1990_5_a9,
     author = {M. G. Tkachenko},
     title = {Countably compact and pseudocompact topologies on free abelian groups},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {68--75},
     year = {1990},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1990_5_a9/}
}