@article{UM_2001_9_2_a7,
     author = {Calda, Emil},
     title = {T\v{r}i nerovnosti s dvojfaktori\'alem aneb {Jak} je u\v{z}ite\v{c}n\'e ob\v{c}as si na n\v{e}co vzpomenout},
     journal = {U\v{c}itel matematiky},
     pages = {117--120},
     year = {2001},
     volume = {9},
     number = {2},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/UM_2001_9_2_a7/}
}