T. Matsui and H. Satz, Phys. Lett. B 178, 416 (1986).
NA50 Collab. (M. C. Abreu et al.), Phys. Lett. B 410, 327 (1997).
NA50 Collab. (M. C. Abreu et al.), Phys. Lett. B 410, 337 (1997).
NA50 Collab. (M. C. Abreu et al.), Phys. Lett. B 477, 28 (2000).
NA50 Collab. (B. Alessandro et al.), Eur. Phys. J. C 39, 335 (2005).
NA50 Collab. (B. Alessandro et al.), Phys. Lett. B 553, 167 (2003).
NA50 Collab. (P. Cortese et al.), Nucl. Phys. A 715, 679s (2003).
NA50 Collab. (B. Alessandro et al.), Eur. Phys. J. C 33, 31 (2004).
L. Kluberg, Eur. Phys. J. C 43, 145 (2005).
NA60 Collab. (R. Arnaldi), Heavy Ion Forum, CERN (6 Oct., 2005).
NA60 Collab. (R. Arnaldi), Nucl. Phys. A 783, 261 (2007).
E. Scomparin (for the NA60 Collab.), J. Phys. G 34, S463 (2007).
NA50 Collab. (M. C. Abreu et al.), Phys. Lett. B 499, 85 (2001).
NA50 Kollab. (N. S. Topil’skaya), Yad. Fiz. 67, 528 (2004) [Phys. At. Nucl. 67, 509 (2004)].
NA50 Collab. (A. B. Kurepin et al.), Nucl. Phys. A 749, 243 (2005).
NA50 Collab. (B. Alessandro et al.), Eur. Phys. J. C 49, 559 (2007).
G. Borges, PhD Thesis (Univ. Tecn. de Lisboa, IST, Nov. 2005).
NA50 Collab. (B. Alessandro et al.), Eur. Phys. J. C 48, 329 (2006).
A. Capella and E. G. Ferreiro, Eur. Phys. J. C 42, 419 (2005).
H. Santos, PhD Thesis (Univ. Tecn. de Lisboa, IST, Oct. 2004).
R. Rapp, Eur. Phys. J. C 43, 91 (2005).
S. Didal, S. Fortunato, and H. Satz, Eur. Phys. J. C 32, 547 (2004).
NA50 Collab. (M. C. Abreu et al.), Phys. Lett. B 521, 195 (2001).
L. Maiani et al., Nucl. Phys. A 748, 209 (2005).
F. Becattini et al., Phys. Lett. B 632, 233 (2006).
PHENIX Collab. (B. V. Jacak et al.), J. Phys. G 34, S543 (2007); PHENIX Collab. (A. Adare et al.), Phys. Rev. Lett. 98, 232301 (2007).
M. J. Leitch, J. Phys. G 34, S453 (2007).
A. P. Kostyuk et al., Phys. Rev. C 68, 041902 (2003).
L. Yan, P. Zhuang, N. Xu, Phys. Rev. Lett. 97, 232301 (2006), nucl-th/0608010.
E. L. Bratkovskaya et al., Phys. Rev. C 69, 054903 (2004).
A. Andronic, P. Braun-Munzinger, K. Redlich, and J. Stachel, Phys. Lett. B 571, 36 (2003).
P. Braun-Munzingen, nucl-th/0701093.
F. Karsch, D. Kharzeev, and H. Satz, Phys. Lett. B 637, 75 (2006).
HERA-B Collab. (I. Abt et al.), Eur. Phys. J. C 49, 545 (2007).