Citation: Mr. Bridson et Sm. Gersten, THE OPTIMAL ISOPERIMETRIC INEQUALITY FOR TORUS BUNDLES OVER THE CIRCLE, Quarterly Journal of Mathematics, 47(185), 1996, pp. 1-23
Citation: Sm. Gersten, THE AUTOMORPHISM GROUP OF A FREE GROUP IS NOT A CAT(0) GROUP, Proceedings of the American Mathematical Society, 121(4), 1994, pp. 999-1002