1. Buekens A. Draft of the study on management of plastic wastes in the EEC region. Economic and Social Council United Nations, May, 1992.
2. Ichazo M, Gonzalez J, Albano C, Navas R. Mechanical properties of PP/HDPE/EPR with calcium carbonate. 12th Bratislava International IUPAC/EPF Conference on Polymers: Modified Polyolefins for Advanced Polymeric Material, Bratislava, Slovak Republic, 1997. p. 99–100.
3. Mechanical properties of iPP/CaCO3 composites;Maiti;J. Appl. Polym Sci.,1991
4. Tensile properties of polypropylene/kaolin composites;Maiti;J. Appl. Polym Sci.,1992
5. Mechanical behavior of CaCO3 particulate-filled B-crystalline phase polypropylene composites;Tjong;Polym Eng. Sci.,1997