External links Brouwer's Fixed Point Theorem for Triangles at cut-the-knot Brouwer theorem , from PlanetMath with attached proof. Reconstructing Brouwer at MathPages Brouwer Fixed Point Theorem at Math Images.
External links Brouwer's Fixed Point Theorem for Triangles at cut-the-knot Brouwer theorem  from PlanetMath with attached proof Reconstructing Brouwer at MathPages Brouwer Fixed Point Theorem at Math Images