@article{PMFA_1985__30_1_a4,
     author = {Vyb{\'\i}ral, Bohumil},
     title = {K n\v{e}kter\'ym didaktick\'ym probl\'em\r{u}m speci\'aln{\'\i} teorie relativity},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {39--45},
     publisher = {mathdoc},
     volume = {30},
     number = {1},
     year = {1985},
     language = {cz},
     url = {https://geodesic-test.mathdoc.fr/item/PMFA_1985__30_1_a4/}
}