@article{PMFA_1984__29_2_a6,
     author = {\v{S}ediv\'y, Jaroslav},
     title = {Institut pro didaktiku matematiky v {Bielefeldu}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {112--115},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1984},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1984__29_2_a6/}
}