@article{1214432418,
author = {Heitsch, James L. and Lawson, Jr., H. Blaine},
title = {Transgressions, Chern-Simons invariants and the classical groups},
journal = {J. Differential Geom.},
volume = {9},
number = {3},
year = {1974},
pages = { 423-434},
language = {en},
url = {http://dml.mathdoc.fr/item/1214432418}
}
Heitsch, James L.; Lawson, Jr., H. Blaine. Transgressions, Chern-Simons invariants and the classical groups. J. Differential Geom., Tome 9 (1974) no. 3, pp. 423-434. http://gdmltest.u-ga.fr/item/1214432418/