@article{GDZPPN001184954, title = {Inverse parabolic problems and discrete orthogonality.}, journal = {Numerische Mathematik}, volume = {59}, year = {1991}, pages = {361-384}, zbl = {0741.65096}, url = {http://dml.mathdoc.fr/item/GDZPPN001184954} }
Gilliam, D.S.; Lund, J.R.; Martin, C.F. Inverse parabolic problems and discrete orthogonality.. Numerische Mathematik, Tome 59 (1991) pp. 361-384. http://gdmltest.u-ga.fr/item/GDZPPN001184954/