@article{RMF_2008_83_4_a0,
     author = {Sm\'ykalov\'a, Radka},
     title = {\v{C}ty\v{r}i trigonometrick\'e nerovnosti},
     journal = {Rozhledy matematicko-fyzik\'aln{\'\i}},
     pages = {1--7},
     year = {2008},
     volume = {83},
     number = {4},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/RMF_2008_83_4_a0/}
}