@article{01780323, title = {Pythagorean identity for polyharmonic polynomials.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {30}, year = {2002}, pages = {115-119}, doi = {10.1155/S0161171202003393}, zbl = {1001.31006}, language = {en}, url = {http://dml.mathdoc.fr/item/01780323} }
Fryant, Allan; Vemuri, Murali Krishna. Pythagorean identity for polyharmonic polynomials.. International Journal of Mathematics and Mathematical Sciences, Tome 30 (2002) pp. 115-119. doi : 10.1155/S0161171202003393. http://gdmltest.u-ga.fr/item/01780323/