An Efficient Algorithm to Compute the Viewshed on DEM Terrains Stored in the External Memory. - Mirella A. Magalhães; Salles V. G. Magalhães; Marcus Vinícius Alvim Andrade; Jugurta Lisboa Filho (GEOINFO, 2007)

Efficient viewshed computation on terrain in external memory. - Marcus V. A. Andrade; Salles V. G. Magalhães; Mirella A. Magalhães; W. Randolph Franklin; Barbara Cutler (GeoInformatica, 2011)