#### Volume 2, issue 1 (1998)

 1 D E Cohen, Groups of cohomological dimension one, Lecture Notes in Mathematics 245, Springer (1972) MR0344359 2 M J Dunwoody, M E Sageev, JSJ–splittings for finitely presented groups over slender groups, Invent. Math. 135 (1999) 25 MR1664694 3 M Freedman, J Hass, P Scott, Closed geodesics on surfaces, Bull. London Math. Soc. 14 (1982) 385 MR671777 4 M Freedman, J Hass, P Scott, Least area incompressible surfaces in 3–manifolds, Invent. Math. 71 (1983) 609 MR695910 5 C H Houghton, Ends of locally compact groups and their coset spaces, J. Austral. Math. Soc. 17 (1974) 274 MR0357679 6 P H Kropholler, M A Roller, Splittings of Poincaré duality groups, Math. Z. 197 (1988) 421 MR926850 7 E Rips, Z Sela, Cyclic splittings of finitely-presented groups and the canonical JSJ decomposition 8 P Scott, Ends of pairs of groups, J. Pure Appl. Algebra 11 (1977/78) 179 MR487104 9 P Scott, A new proof of the annulus and torus theorems, Amer. J. Math. 102 (1980) 241 MR564473 10 G P Scott, G A Swarup, An algebraic annulus theorem, Pacific J. Math. 196 (2000) 461 MR1800588 11 P Scott, T Wall, Topological methods in group theory, from: "Homological group theory (Proc. Sympos., Durham, 1977)", London Math. Soc. Lecture Note Ser. 36, Cambridge Univ. Press (1979) 137 MR564422 12 J P Serre, Arbres, amalgames, $\mathrm{SL}_2$, Astérisque 46, Société Mathématique de France (1977) MR0476875 13 J P Serre, Trees, Springer (1980) MR607504