@article{05909802, title = {Models of quadratic algebras generated by superintegrable systems in 2D.}, journal = {SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]}, volume = {7}, year = {2011}, doi = {10.3842/SIGMA.2011.036}, zbl = {1217.22020}, language = {en}, url = {http://dml.mathdoc.fr/item/05909802} }
Post, Sarah. Models of quadratic algebras generated by superintegrable systems in 2D.. SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only], Tome 7 (2011) . doi : 10.3842/SIGMA.2011.036. http://gdmltest.u-ga.fr/item/05909802/