@article{CMUC_1980__21_1_a10,
     author = {Ne\v{c}as, Jind\v{r}ich and John, Old\v{r}ich and Star\'a, Jana},
     title = {Counterexample to the regularity of weak solution of elliptic systems},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {145--154},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1980},
     mrnumber = {566246},
     zbl = {0442.35034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1980__21_1_a10/}
}