#### Volume 2, issue 1 (2002)

 1 G Burde, H Zieschang, Knots, de Gruyter Studies in Mathematics 5, Walter de Gruyter & Co. (1985) MR808776 2 M Culler, C M Gordon, J Luecke, P B Shalen, Dehn surgery on knots, Ann. of Math. $(2)$ 125 (1987) 237 MR881270 3 D Gabai, Foliations and the topology of 3–manifolds III, J. Differential Geom. 26 (1987) 479 MR910018 4 C M Gordon, J Luecke, Knots are determined by their complements, J. Amer. Math. Soc. 2 (1989) 371 MR965210 5 D J Heath, T Kobayashi, Essential tangle decomposition from thin position of a link, Pacific J. Math. 179 (1997) 101 MR1452527 6 K Morimoto, On tunnel number and connected sum of knots and links, from: "Geometric topology (Haifa, 1992)", Contemp. Math. 164, Amer. Math. Soc. (1994) 177 MR1282762 7 K Morimoto, On the super additivity of tunnel number of knots, Math. Ann. 317 (2000) 489 MR1776114 8 Y Rieck, Heegaard structures of manifolds in the Dehn filling space, Topology 39 (2000) 619 MR1746912 9 Y Rieck, E Sedgwick, Finiteness results for Heegaard surfaces in surgered manifolds, Comm. Anal. Geom. 9 (2001) 351 MR1846207 10 M Scharlemann, A Thompson, Thin position and Heegaard splittings of the 3–sphere, J. Differential Geom. 39 (1994) 343 MR1267894 11 H Schubert, Über eine numerische Knoteninvariante, Math. Z. 61 (1954) 245 MR0072483 12 J Schultens, Additivity of bridge numbers of knots, Sūrikaisekikenkyūsho Kōkyūroku (2001) 103 MR1905565 13 A Thompson, Thin position and bridge number for knots in the 3–sphere, Topology 36 (1997) 505 MR1415602