#### Volume 9, issue 1 (2005)

 1 P Di Francesco, C Itzykson, Quantum intersection rings, from: "The moduli space of curves (Texel Island, 1994)", Progr. Math. 129, Birkhäuser (1995) 81 MR1363054 2 L Göttsche, R Pandharipande, The quantum cohomology of blow-ups of $\mathbb{P}^2$ and enumerative geometry, J. Differential Geom. 48 (1998) 61 MR1622601 3 G M Greuel, U Karras, Families of varieties with prescribed singularities, Compositio Math. 69 (1989) 83 MR986814 4 G M Greuel, C Lossen, E Shustin, Geometry of families of nodal curves on the blown-up projective plane, Trans. Amer. Math. Soc. 350 (1998) 251 MR1443875 5 I V Itenberg, V M Kharlamov, E I Shustin, Logarithmic equivalence of the Welschinger and the Gromov–Witten invariants, Uspekhi Mat. Nauk 59 (2004) 85 MR2138469 6 S M Ivashkovich, V V Shevchishin, Deformations of noncompact complex curves, and envelopes of meromorphy of spheres, Mat. Sb. 189 (1998) 23 MR1680860 7 H Hofer, V Lizan, J C Sikorav, On genericity for holomorphic curves in four-dimensional almost-complex manifolds, J. Geom. Anal. 7 (1997) 149 MR1630789 8 J Kollár, Rational curves on algebraic varieties, Ergebnisse der Mathematik und ihrer Grenzgebiete. 3. Folge. A Series of Modern Surveys in Mathematics [Results in Mathematics and Related Areas. 3rd Series. A Series of Modern Surveys in Mathematics], Springer (1996) MR1440180 9 M Kontsevich, Y Manin, Gromov–Witten classes, quantum cohomology, and enumerative geometry, Comm. Math. Phys. 164 (1994) 525 MR1291244 10 D McDuff, Immersed spheres in symplectic 4–manifolds, Ann. Inst. Fourier (Grenoble) 42 (1992) 369 MR1162567 11 D McDuff, D Salamon, Introduction to symplectic topology, Oxford Mathematical Monographs, The Clarendon Press Oxford University Press (1998) MR1698616 12 D McDuff, D Salamon, $J$–holomorphic curves and symplectic topology, American Mathematical Society Colloquium Publications 52, American Mathematical Society (2004) MR2045629 13 G Mikhalkin, Counting curves via lattice paths in polygons, C. R. Math. Acad. Sci. Paris 336 (2003) 629 MR1988122 14 G Mikhalkin, Enumerative tropical algebraic geometry in $\mathbb R^2$, J. Amer. Math. Soc. 18 (2005) 313 MR2137980 15 A Nobile, On specializations of curves I, Trans. Amer. Math. Soc. 282 (1984) 739 MR732116 16 E Shustin, A tropical approach to enumerative geometry, Algebra i Analiz 17 (2005) 170 MR2159589 17 J Y Welschinger, Invariants of real rational symplectic 4–manifolds and lower bounds in real enumerative geometry, C. R. Math. Acad. Sci. Paris 336 (2003) 341 MR1976315 18 J Y Welschinger, Invariants of real symplectic 4–manifolds and lower bounds in real enumerative geometry, Invent. Math. 162 (2005) 195 MR2198329