@article{PMFA_1981__26_1_a3,
     author = {Jacobsen, E. C.},
     title = {Kapesn{\'\i} kalkul\'ator - n\v{e}kter\'e d\r{u}sledky pro \v{s}koly},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {45--52},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1981},
     language = {cz},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1981__26_1_a3/}
}