@inproceedings{bridges1998:157,
  author      = {Sharp, John},
  title       = {Problems with Holbein's Ambassadors and the Anamorphosis of the Skull},
  pages       = {157--166},
  booktitle   = {Bridges: Mathematical Connections in Art, Music, and Science},
  year        = {1998},
  editor      = {Sarhangi, Reza},
  isbn        = {0-9665201-0-6},
  issn        = {1099-6702},
  publisher   = {Bridges Conference},
  address     = {Southwestern College, Winfield, Kansas},

  url         = {http://archive.bridgesmathart.org/1998/bridges1998-157.html}
}