@article{10_1007_s10492_006_0009_7,
     author = {Chen, Wei and K\v{r}{\'\i}\v{z}ek, Michal},
     title = {What is the smallest possible constant in {C\'ea's} lemma?},
     journal = {Applications of Mathematics},
     pages = {129--144},
     publisher = {mathdoc},
     volume = {51},
     number = {2},
     year = {2006},
     doi = {10.1007/s10492-006-0009-7},
     mrnumber = {2212310},
     zbl = {1164.65495},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-006-0009-7/}
}