Geodesic
Spectral element method for boundary value problems on unstructered grid
Matematičeskoe modelirovanie, Tome 19 (2007) no. 10, pp. 3-14

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The computation technology in constructing two dimensional boundary value problems by means of spectral element method is described in this paper. The given method allows to find solution of high accuracy on coarse unstructed grids. The solutions obtained with this method serve for local approximation algorithms testing and also may have independent meaning in development devices and systems of high accuracy. 
@article{MM_2007_19_10_a0,
     author = {A. M. Bubenchikov and V. S. Poponin and D. K. Firsov},
     title = {Spectral element method for boundary value problems on unstructered grid},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {3--14},
     publisher = {mathdoc},
     volume = {19},
     number = {10},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_2007_19_10_a0/}
}
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A. M. Bubenchikov; V. S. Poponin; D. K. Firsov. Spectral element method for boundary value problems on unstructered grid. Matematičeskoe modelirovanie, Tome 19 (2007) no. 10, pp. 3-14. http://geodesic.mathdoc.fr/item/MM_2007_19_10_a0/