BibTex format
@article{Duff:2003:10.1016/j.nuclphysb.2003.09.019,
author = {Duff, MJ and Liu, JT},
doi = {10.1016/j.nuclphysb.2003.09.019},
journal = {Nuclear Physics B},
pages = {217--230},
title = {Hidden spacetime symmetries and generalized holonomy in M-theory},
url = {http://dx.doi.org/10.1016/j.nuclphysb.2003.09.019},
volume = {674},
year = {2003}
}