@article{10_4153_CMB_2013_016_7,
     author = {Perrone, Domenico},
     title = {Curvature of {K-contact} {Semi-Riemannian} {Manifolds}},
     journal = {Canadian mathematical bulletin},
     pages = {401--412},
     year = {2014},
     volume = {57},
     number = {2},
     doi = {10.4153/CMB-2013-016-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2013-016-7/}
}