  In paper "A new twist on Lorenz links" (Journal of Topology 2(2009), 227-248)
Joan Birman and Ilya Kofman prove the coincidence of the class of Lorenz links
and the class of twisted links. The proof in that work is algebraic. We will
identify this class in terms of grid diagrams and provide a transparent
geometric argument for Birman-Kofman's result.
