. "Legaut Bernard, Barret Lionel, Armetta Frederic, Bouakaz Saida, Hassas Salima . Simulation of dynamic city environments and a related fabrication method, . United States, Patent n\u00B0 : US2009051686 . 4905 . 2009" . "Simulation of dynamic city environments and a related fabrication method," . "2009" . . .