@article{2952,
author = {Namasivayam, S. and Ortiz, Eduardo L.},
title = {Best approximation and the numerical solution of partial differential equations with the tau method},
journal = {Portugaliae mathematica},
volume = {40},
year = {1981},
pages = {97-119},
zbl = {0563.65061},
mrnumber = {0796092},
language = {en},
url = {http://dml.mathdoc.fr/item/2952}
}
Namasivayam, S.; Ortiz, Eduardo L. Best approximation and the numerical solution of partial differential equations with the tau method. Portugaliae mathematica, Tome 40 (1981) pp. 97-119. http://gdmltest.u-ga.fr/item/2952/