@article{MASLO_1954_4_2_a0,
     author = {\'Ulehla, I.},
     title = {O vz\'ajomnom vz\v{t}ahu hmotnosti a energie},
     journal = {Mathematica slovaca},
     pages = {45--54},
     year = {1954},
     volume = {4},
     number = {2},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1954_4_2_a0/}
}