@article{05038636, title = {Noether symmetries and critical exponents.}, journal = {SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]}, volume = {1}, year = {2005}, zbl = {1123.34030}, language = {en}, url = {http://dml.mathdoc.fr/item/05038636} }
Bozhkov, Yuri. Noether symmetries and critical exponents.. SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only], Tome 1 (2005) . http://gdmltest.u-ga.fr/item/05038636/