https://www.youtube.com/watch?v=fsBHF_j2FJ4
https://www.youtube.com/watch?v=Iz9Ht0ekU8I
https://www.youtube.com/watch?v=1rrPv5AlVXg
http://www.sciencedirect.com/science/article/pii/S0261306913011345
http://depts.washington.edu/matseed/mse_resources/Webpage/Memory%20metals/how_shape_memory_alloys_work.htm
http://web.stanford.edu/~richlin1/sma/sma.html
https://www.youtube.com/watch?v=Iz9Ht0ekU8I
https://www.youtube.com/watch?v=1rrPv5AlVXg
http://www.sciencedirect.com/science/article/pii/S0261306913011345
http://depts.washington.edu/matseed/mse_resources/Webpage/Memory%20metals/how_shape_memory_alloys_work.htm
http://web.stanford.edu/~richlin1/sma/sma.html