Several literature, television, film and music pieces have made references to other reindeer. In many cases, these are explicitly related to other reindeer already in the fleet; however, these portrayals are usually never deemed as official and are constantly being rewritten and altered. The only case in which an addition to the team devised by another was in the case of the famous "Rudolph the Red-Nosed Reindeer" by Robert L. May, gaining an iconic and traditional status.