@misc{PMFA_1990_35_2_a1,
     title = {[Obrazov\'a p\v{r}{\'\i}loha k \v{c}l\'anku {Gravit\'acia} a antihmota]},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {65--[65g]},
     year = {1990},
     volume = {35},
     number = {2},
     language = {sk},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1990_35_2_a1/}
}