@Journal{DBLP:journals/ijcga/AbelloESU98,
   title = {Illumination of Orthogonal Polygons with Orthogonal Floodlights},
   author = {James Abello and Vladimir Estivill-Castro and Thomas C. Shermer and Jorge Urrutia},
   year = 1998,
   Journal = {Int. J. Comput. Geometry Appl.},
   Volume = 8,
   Number = 1,
   Pages = {25-38}
}