@article{10_21136_MB_2010_140827, author = {Dal{\'\i}k, Josef}, title = {Operators approximating partial derivatives at vertices of triangulations by averaging}, journal = {Mathematica Bohemica}, pages = {363--372}, publisher = {mathdoc}, volume = {135}, number = {4}, year = {2010}, doi = {10.21136/MB.2010.140827}, mrnumber = {2681010}, zbl = {1224.65057}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.2010.140827/} }