@article{05309260, title = {Equivariance, variational principles, and the Feynman integral.}, journal = {SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]}, volume = {4}, year = {2008}, doi = {10.3842/SIGMA.2008.032}, zbl = {1232.70044}, language = {en}, url = {http://dml.mathdoc.fr/item/05309260} }
Svetlichny, George. Equivariance, variational principles, and the Feynman integral.. SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only], Tome 4 (2008) . doi : 10.3842/SIGMA.2008.032. http://gdmltest.u-ga.fr/item/05309260/