@Image{img:snsd,
  title        = "Topological Girl's Generation",
  author       = "Topological Girl's Generation",
  URL          = "https://topologicalgirlsgeneration.tumblr.com/",
  note         = "(dead link)",
}

@Image{img:omega500,
  title        = "Omega exp",
  author       = "Pop-up casket",
  URL          = "https://commons.wikimedia.org/wiki/File:Omega-exp-omega-labeled.svg",
  note         = "Public domain",
}

@Image{img:exercise,
  title        = "Math Text",
  author       = "Abstruse Goose",
  URL          = "https://abstrusegoose.com/12",
  year         = "2008",
  note         = "CC 3.0",
}

@Image{img:apples,
  title        = "Apple",
  author       = "George Hodan",
  URL          = "https://www.publicdomainpictures.net/view-image.php?image=20117",
  note         = "Public domain",
}

@Image{img:velociraptor,
  title        = "Velociraptor",
  author       = "Petr Kratochvil",
  URL          = "https://www.publicdomainpictures.net/view-image.php?image=93881",
  note         = "Public domain",
}

@Image{img:tangentplane,
  title        = "Normal surface vector",
  author       = "g.kov",
  URL          = "https://tex.stackexchange.com/a/235142/76888",
}

@Image{img:torus,
  title        = "Projection color torus",
  author       = "Toahigherlevel",
  URL          = "https://en.wikipedia.org/wiki/File:Projection_color_torus.jpg",
  note         = "Public domain",
}

@Image{img:kleinfold,
  title        = "Klein Bottle Folding",
  author       = "Inductiveload",
  URL          = "https://commons.wikimedia.org/wiki/File:Klein_Bottle_Folding_1.svg",
  note         = "Public domain",
}

@Image{img:kleinbottle,
  title        = "Klein bottle",
  author       = "Fropuff",
  URL          = "https://en.wikipedia.org/wiki/File:KleinBottle-01.png",
  note         = "Public domain",
}

@Image{img:read_with_pencil,
  title        = "The Math Major Who Never Reads Math",
  author       = "Ben Orlin",
  URL          = "https://mathwithbaddrawings.com/2015/03/17/the-math-major-who-never-reads-math/",
}

@Image{img:stokes,
  title        = "Stokes patch",
  author       = "Krish Navedala",
  URL          = "https://en.wikipedia.org/wiki/File:Stokes_patch.svg",
  note         = "Public domain",
}

@Image{img:weierstrass,
  title        = "Weierstrass function",
  author       = "Eeyore22",
  URL          = "https://commons.wikimedia.org/wiki/File:WeierstrassFunction.svg",
  note         = "Public domain",
}

@Image{img:xkcd,
  title        = "Fundamental Forces",
  author       = "Randall Munroe",
  URL          = "https://xkcd.com/1489/",
  note         = "CC 2.5",
}

@Image{img:xkcd_rolles,
  title        = "Rolle's theorem",
  author       = "Randall Munroe",
  URL          = "https://xkcd.com/2042/",
  note         = "CC 2.5",
}

@Image{img:zornaholic,
  title        = "Zornaholic",
  author       = "Abstruse Goose",
  URL          = "https://abstrusegoose.com/133",
  year         = "2009",
  note         = "CC 3.0",
}

@Image{img:calvin_hobbes_fly,
  title        = "Calvin and Hobbes",
  author       = "Bill Watterson",
  note         = "I think this is fair use.",
}

@Image{img:cantor,
  title        = "Cantor set in seven iterations",
  author       = "127``rect''",
  URL          = "https://en.wikipedia.org/wiki/File:Cantor_set_in_seven_iterations.svg",
  note         = "Public domain",
  year         = "2007",
}

@Image{img:matrixmult,
  title        = "How to Multiply Matrices - A 2x2 Matrix by various
                 sizes",
  author       = "MathMathsMathematics",
  URL          = "https://youtu.be/pJwslaulUMU",
  year         = "2012",
  month        = "5",
  day          = "30",
}
