Geodesic
The completion of the classification of the regular near octagons with thick quads
Journal of Algebraic Combinatorics, Tome 24 (2006) no. 1, pp. 23-29.

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Summary: Brouwer and Wilbrink [3] showed the nonexistence of regular near octagons whose parameters $s, t _{2}, t _{3}$ and $t$ satisfy $s \geq 2, t _{2} \geq 2$ and $t _{3} \neq t _{2}( t _{2}+1)$. Later an arithmetical error was discovered in the proof. Because of this error, the existence problem was still open for the near octagons corresponding with certain values of $s, t _{2}$ and $t _{3}$. In the present paper, we will also show the nonexistence of these remaining regular near octagons.
Classification : 05B25, 05E30
Keywords: keywords $(regular)$ near polygon 
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De Bruyn, Bart. The completion of the classification of the regular near octagons with thick quads. Journal of Algebraic Combinatorics, Tome 24 (2006) no. 1, pp. 23-29. http://geodesic.mathdoc.fr/item/JAC_2006__24_1_a5/