Complete source list – Link #139: NASA Drives Mars Rover Curiosity Backwards!
http://en.wikipedia.org/wiki/Curiosity_(rover)
http://www.space.com/13699-nasa-mars-rover-curiosity-11-facts.html
http://www.jpl.nasa.gov/news/news.php?feature=4053
http://www.livescience.com/43563-mars-rover-curiosity-driving-reverse.html
http://www.space.com/24764-mars-rover-curiosity-driving-reverse.html
http://www.space.com/26472-mars-rover-curiosity-wheel-damage.html
http://en.wikipedia.org/wiki/Curiosity_(rover)
http://www.space.com/13699-nasa-mars-rover-curiosity-11-facts.html
http://www.techtimes.com/articles/3689/20140224/mars-rover-curiosity-slams-reverse-gear-to-reduce-wheels-wear-and-tear.htm
http://www.telegraph.co.uk/news/worldnews/northamerica/usa/10663081/Mars-Rover-goes-into-reverse.html
http://sanfrancisco.cbslocal.com/2014/06/22/mars-rover-curiosity-drive-reverse-spare-damaged-wheels/