@article{1103842444,
author = {Ponzano, G. and Regge, T. and Speer, E. R. and Westwater, M. J.},
title = {The monodromy rings of one loop Feynman integrals},
journal = {Comm. Math. Phys.},
volume = {16},
number = {1},
year = {1970},
pages = { 1-64},
language = {en},
url = {http://dml.mathdoc.fr/item/1103842444}
}
Ponzano, G.; Regge, T.; Speer, E. R.; Westwater, M. J. The monodromy rings of one loop Feynman integrals. Comm. Math. Phys., Tome 16 (1970) no. 1, pp. 1-64. http://gdmltest.u-ga.fr/item/1103842444/