@article{NUMA_1991__59_8_133555,
     author = {D.S. Gilliam and J.R. Lund and C.F. Martin},
     title = {Inverse parabolic problems and discrete orthogonality.},
     journal = {Numerische Mathematik},
     pages = {361--384},
     publisher = {mathdoc},
     volume = {59},
     number = {8},
     year = {1991},
     zbl = {0741.65096},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1991__59_8_133555/}
}