http://www.particleadventure.org/fermibos.html

http://www.particleadventure.org/fermibos.html

Thermal Physics: Entropy and Free Energies

https://books.google.com/books?isbn=9814340766

Joon Chang Lee - 2011 - ‎Science

It appears as if fermions now repel each other while bosons attract each other. In fact that is effectively what they do. The effective force is called the exchange