1991

90.            H. Burger, K. Kneipp, H. Hobert, W. Vogel, V. Kozhukharov, S. Neov
                 "Glass-formation properties and structure of glasses in the TeO2 - ZnO
                  system"
                  J. Non- Cryst. Sci. 151 (1991) 134 - 142.

91.             Ch. Trapalis, V. Kozhukharov, B. Samuneva
                  "Phase characterization of gel products containing SiO2 - SnO2"
                  7-th CIMTEC, World Ceramics Congress, Satellite Symp. Al, Montecatini
                  Terme, Italy, June 24 -30 (1990) 67, (1991) 242- 260.

91.             V. Kozhukharov, S. Nikolov, B. Samuneva, Ch. Trapalis
                 "Fe(III)- containing gel products and their spectroscopy characteristics"
                  7-th CIMTEC, World Ceramics Congress, Satellite Symp. Al, Montecatini
                  Terme, Italy, June 24 -30 (1990), publ. 67, (1991) 242- 260.

                 A. Popov, V. Kozhukharov
                 "Synthesis and phase analysis of compositions in the Te-CuI-AgI"
                 12-th Greek-Bulgarian Symposium en Semiconductor Physics, Thesaloniki,
                 Greece, October 14-17 (1991) 201 - 220 (See 106 )