Reference

Perez-Lorenzo, J., Vazquez-Martin, R., Antunez, E., & Bandera, A. (2009). A Dual Graph Pyramid Approach to Grid-Based and Topological Maps Integration for Mobile Robotics. In Bio-Inspired Systems: Computational and Ambient Intelligence (pp. 781–788). Springer. http://hdl.handle.net/20.500.12708/52929