@article{PMFA_2019_64_3_a2,
     author = {Dole\v{z}\'alek, Mat\v{e}j},
     title = {Kvaterniony a d\r{u}kaz {Lagrangeovy} v\v{e}ty o \v{c}ty\v{r}ech \v{c}tverc{\'\i}ch},
     journal = {Pokroky matematiky, fyziky a astronomie},
     pages = {145--160},
     year = {2019},
     volume = {64},
     number = {3},
     language = {cs},
     url = {http://geodesic.mathdoc.fr/item/PMFA_2019_64_3_a2/}
}