G. Ivanov, "Influence of the scale factor and density on the flexural strength of foamed polyamide reinforced with glass fibbers," Conference on Polymers, Varna, Bulgaria, November 15 - 17, 1983.
G. Ivanov, A. Antonov and B. Danev, "Determination of melt pressure in the mold during injection molding of thin wall foamed articles," J. Technicheska misal, Bulgarian Academy of Sciences, 21, p 117 (1984).
G. Ivanov and L. Ivanova, "Multiple processing of foamed and solid high density polyethylene," J. Plasticheskie massi, 9, p 57 (1985).
G. Ivanov and M. Gateva, "Application of basalt fibbers as reinforcing fillers for polyamide," Plaste und Kautschuk, 36 (2), p 68 (1989).
H. Arastoopour, G. Ivanov and F. Shutov, "Recycling of polyurethane foam wastes using new pulverization principle: solid state shear extrusion (SSSE)," 2nd International Conference, "Cellular Polymers", March 23-25, 1993, Edinburgh, Scotland, UK.
N. Enayati, S. Parulekar, F. Shutov, G. Ivanov, "Biodegradation of agrowaste polymers", ACS 208th National Meeting, Washington, DC, August 21-25, 1994.
S. Venkatasanthanam, G. Ivanov, F. Shutov, "Low-density polymer composites: polyurethane foams reinforced with powder from polymer wastes," AIChE 1994 Annual Meeting, San Francisco, CA, November 13-18, 1994.
G. Ivanov, "Some aspects of a plastics pulverization technology by extrusion," Polym. Eng. Sci.,40, 676 (2000).