- for IFAE2006 - Incontri sulla Fisica delle Alte Energie, Pavia, Italy, 19-21 April 2006:
   "Cosmology and Neutrinos, of fixed and variable mass", pdf file;
   published in "Proceedings of IFAE2006", ed. Springer Italia

- for PASCOS'04 - 10th international symposium on Particles, Strings and Cosmology, 16-22 August 2004, Northeastern University, Boston, Ma, Usa:
  "Sterile Neutrinos in Cosmology and Supernovae", pdf file;
  published in "Proceedings of PASCOS'04/NathFest", ed. World Scientific

- for IFAE2004 - Incontri sulla Fisica delle Alte Energie, Torino, Italy, 14-16 April 2004:
  "Probing sterile neutrinos with Astrophysics, Cosmology and ...the rest",  pdf file ;
  published in "Proceedings of IFAE2004"

- for IFAE2003 - Incontri sulla Fisica delle Alte Energie, Lecce, Italy, 23-26 April 2003:
  "Neutrinos in Extra Dimensions and Supernovae: which signal from the next explosion?",  pdf file ;
  published in "Proceedings of IFAE2003", ed. Societa' Italiana di Fisica