@article{PMFA_1980_25_2_a2,
     author = {Laugwitz, Detlef},
     title = {Eulerovy \v{c}tverce},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {69--79},
     year = {1980},
     volume = {25},
     number = {2},
     zbl = {0429.05023},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1980_25_2_a2/}
}