@article{CMUC_1991__32_1_a3,
     author = {Trlifaj, Jan},
     title = {Non-perfect rings and a theorem of {Eklof} and {Shelah}},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {27--32},
     publisher = {mathdoc},
     volume = {32},
     number = {1},
     year = {1991},
     mrnumber = {1118286},
     zbl = {0742.16001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1991__32_1_a3/}
}