: [https://en.wikipedia.org/wiki/Mathematical_morphology Mathematical morphology from Wikipedia]
* [https://en.wikipedia.org/wiki/Metamorphosis Metamorphosis from Wikipedia]
* [https://en.wikipedia.org/wiki/Donald_Fagen Donald Fagen] - [https://en.wikipedia.org/wiki/Morph_the_Cat Morph the Cat] (2006), [https://en.wikipedia.org/wiki/YouTube YouTube] Video
