Navigation in Highly Polygon-Populated Ship Environments using the Visibility Octree. - Carlos Saona-Vázquez; Isabel Navazo; Pere Brunet (CAD Tools and Algorithms for Product Design, 1998)

The visibility octree: a data structure for 3D navigation. - Carlos Saona-Vázquez; Isabel Navazo; Pere Brunet (Comput. Graph., 1999)

LOD visibility culling and occluder synthesis. - Carlos Andújar; Carlos Saona-Vázquez; Isabel Navazo (Comput. Aided Des., 2000)

Integrating Occlusion Culling with Levels of Detail through Hardly-Visible Sets. - Carlos Andújar; Carlos Saona-Vázquez; Isabel Navazo; Pere Brunet (Comput. Graph. Forum, 2000)

Hoops: 3D Curves as Conservative Occluders for Cell Visibility. - Pere Brunet; Isabel Navazo; Jarek Rossignac; Carlos Saona-Vázquez (Comput. Graph. Forum, 2001)