@article{TIMM_2012_18_4_a6,
     author = {N. V. Baidakova},
     title = {Upper estimates for the error of approximation of derivatives in a~finite element of {Hsieh--Clough--Tocher} type},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {80--89},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2012_18_4_a6/}
}