@article{PMFA_1996_41_5_a4,
     author = {Jan\'a\v{c}kov\'a, Alena and Matyska, Ctirad},
     title = {Koment\'a\v{r} k \v{c}l\'anku {R.} {Ladburyho}},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {266--279},
     year = {1996},
     volume = {41},
     number = {5},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_1996_41_5_a4/}
}