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Gluing two affine spaces. Pasini, Antonio (1996) Bulletin of the Belgian Mathematical Society - Simon Stevin
Group actions on twin buildings. Abramenko, Peter (1996) Bulletin of the Belgian Mathematical Society - Simon Stevin
Groups acting on products of trees, tiling systems and analytic K -theory. Kimberley, Jason S., Robertson, Guyan (2002) The New York Journal of Mathematics [electronic only]
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