@book{wegert_visualcpx_2012,
  author    = {Elias Wegert},
  title     = {Visual Complex Functions. An Introduction with Phase Portraits},
  publisher = {Springer},
  year      = 2012,
  address   = {Basel Heidelberg New York Dordrecht London},
  isbn      = {978-3-0348-0179-9},
  pages     = 360
}
