@article{article75905e3f,
title   = {Ruled Weingarten hypersurfaces in the Lorentz-Minkowski space and in de Sitter space},
author = {Asperti, Antonio Carlos and Chaves, Rosa Maria dos Santos Barreiro and Valério, Barbara Corominas},
year = {2010},
doi = {10.1016/j.geomphys.2009.12.013},
journal   = {Journal of Geometry and Physics}
}