1. Leonardo's Lost Robots;Rosheim,2006
2. The da Vinci robot;Moran;J. Endourol.,2006
3. Introduction to “mechanization in industry”;Mills,1934
4. Rossum's Universal Robots;Čapek,1920
5. The Atlantic Website, The 1939 New York World’s Fair, http://www.theatlantic.com/photo/2013/11/the-1939-new-york-worlds-fair/100620/. (Accessed 1 October 2016).