1. Three ingredients for becoming;Call,2013
2. Tool use for autonomous agents;Amant,2005
3. Tool construction and use challenge: tooling test rebooted;Choe,2015
4. Animal Tool Behavior: The Use and Manufacture of Tools by Animals;Shumaker,2011
5. Tool bending in New Caledonian crows;Rutz;R. Soc. Open Sci.,2016