@ARTICLE{j.valente2013anaerial-groundrobotic, TITLE = {An Aerial-Ground Robotic System for Navigation and Obstacle Mapping in Large Outdoor Areas}, JOURNAL = {Sensors}, VOLUME = {13}, NUMBER = {1}, PAGES = {1247 - 1267}, YEAR = {2013}, AUTHOR = {Mario Garzón, J. Valente, David Zapata, Antonio Barrientos} }