@article{1103904675, author = {Eckmann, J.-P. and Epstein, H.}, title = {Time-ordered products and Schwinger functions}, journal = {Comm. Math. Phys.}, volume = {58}, number = {1}, year = {1978}, pages = { 95-130}, language = {en}, url = {http://dml.mathdoc.fr/item/1103904675} }
Eckmann, J.-P.; Epstein, H. Time-ordered products and Schwinger functions. Comm. Math. Phys., Tome 58 (1978) no. 1, pp. 95-130. http://gdmltest.u-ga.fr/item/1103904675/