@article { 41,
	title = {Magnetic field production during preheating at the electroweak scale},
	volume = {100:241301},
	year = {2008},
	publisher = {Phys. Rev. Lett.},
	URL = {http://arxiv.org/abs/arXiv:0712.4263},
	author = {A. Díaz-Gil, J. García-Bellido, M. García Pérez and A. González-Arroyo}
}