@article{PMFA_2000_45_2_a3,
     author = {Trlifaj, Jan},
     title = {Obaly a~pokryt{\'\i} v~teorii modul\r{u}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {134--148},
     year = {2000},
     volume = {45},
     number = {2},
     zbl = {1051.16004},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2000_45_2_a3/}
}