@article{02220834, title = {Smoothing properties in multistep backward difference method and time derivative approximation for linear parabolic equations.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2005}, year = {2005}, pages = {523-536}, doi = {10.1155/IJMMS.2005.523}, zbl = {1082.65092}, language = {en}, url = {http://dml.mathdoc.fr/item/02220834} }
Yan, Yubin. Smoothing properties in multistep backward difference method and time derivative approximation for linear parabolic equations.. International Journal of Mathematics and Mathematical Sciences, Tome 2005 (2005) pp. 523-536. doi : 10.1155/IJMMS.2005.523. http://gdmltest.u-ga.fr/item/02220834/