@article{10_1007_s10492_012_0026_7,
     author = {Dal{\'\i}k, Josef},
     title = {The invertibility of the isoparametric mappings for triangular quadratic {Lagrange} finite elements},
     journal = {Applications of Mathematics},
     pages = {445--462},
     publisher = {mathdoc},
     volume = {57},
     number = {5},
     year = {2012},
     doi = {10.1007/s10492-012-0026-7},
     mrnumber = {2984613},
     zbl = {1265.65233},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-012-0026-7/}
}