Researches - Readymades

Readymade - Art term (Tate)

http://www.tate.org.uk/art/art-terms/r/readymade

Readymade - Britannica

https://www.britannica.com/art/ready-made

Readymades of Marcel Duchamp

https://en.wikipedia.org/wiki/Readymades_of_Marcel_Duchamp