The four-color problem /

Míreanna comhchosúla

• The four-color problem : assaults and conquest/
  de réir: 493190 Saaty, Thomas L. (Thomas Lorie), et al.
  Foilsithe / Cruthaithe: (1977)
• Every planar map is four colorable /
  de réir: 322322 Appel, Kenneth
  Foilsithe / Cruthaithe: (1989)
• Graphs, colourings and the four-colour theorem /
  de réir: 374980 Wilson, Robert A.
  Foilsithe / Cruthaithe: (2002)
• Map color theorem/
  de réir: 176589 Ringel, Gerhard
  Foilsithe / Cruthaithe: (1974)
• Design a Model of Four Color Separation Prism in Satellite Camera
  de réir: Atefe Ajami, et al.
  Foilsithe / Cruthaithe: (2012-10-01)