@article{1104162092,
author = {Witten, Edward},
title = {Topological sigma models},
journal = {Comm. Math. Phys.},
volume = {113},
number = {4},
year = {1988},
pages = { 411-449},
language = {en},
url = {http://dml.mathdoc.fr/item/1104162092}
}
Witten, Edward. Topological sigma models. Comm. Math. Phys., Tome 113 (1988) no. 4, pp. 411-449. http://gdmltest.u-ga.fr/item/1104162092/