1. M. Abellanas, G. Hernández, Optimización de Rutas de Evacuación, in: Proceedings of the XII Encuentros de Geometría Computacional, Valladolid, Spain, 2007, pp. 273–280 (in Spanish)
2. Covering a line segment with variable radius discs;Agnetis;Computers and Operations Research,2009
3. Voronoi diagrams;Aurenhammer,2000
4. P. Belleville, P. Bose, J. Czyzowicz, J. Urrutia, J. Zaks, K-Guarding polygons on the plane, in: Proceedings of the 6th Canadian Conference in Computational Geometry, Saskatchewan, Canada, 1994, pp. 381–386
5. Backtrack programming;Golomb;Journal of ACM,1965