References
==========

.. [Wegert]  Domain Coloring is based on Elias Wegert's book
    `"Visual Complex Functions" <https://www.springer.com/de/book/9783034801799>`_.
    The book provides the background to better understand the images.

.. [colorcet] https://colorcet.com/

.. [Riemann-sphere] https://en.wikipedia.org/wiki/Riemann_sphere

.. [Stereographic] https://en.wikipedia.org/wiki/Stereographic_projection

.. [Pole-Zero] https://en.wikipedia.org/wiki/Pole%E2%80%93zero_plot

.. [M-circles] https://en.wikipedia.org/wiki/Hall_circles

.. [Nichols] https://en.wikipedia.org/wiki/Hall_circles