@article{SJVM_2005_8_2_a0,
     author = {A. B. Andreev and T. J. Todorov},
     title = {Superconvergence of the gradient for cubic triangular finite elements},
     journal = {Sibirskij \v{z}urnal vy\v{c}islitelʹnoj matematiki},
     pages = {89--100},
     publisher = {mathdoc},
     volume = {8},
     number = {2},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SJVM_2005_8_2_a0/}
}