@article{PMFA_1995_40_4_a3,
     author = {Jan\'a\v{c}kov\'a, Alena},
     title = {Zem\v{e} je velik\'y magnet},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {192--197},
     year = {1995},
     volume = {40},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1995_40_4_a3/}
}