• On the Non-Homogeneity of Completely Positive Cones (with M.S. Gowda), Research Report, October 2011 
  • 90th anniversary of creation of Polish School of Mathematics. Polish Mathematics between wars (in Polish). Lecture given on May 1, 2009 at the Polish Library Discussion Club, Washington, D.C.  
  • Representation theorem for the Lorentz cone automorphisms (with M.S. Gowda), July 2006