1. ASTM. (1984). “Standard test methods for determining the pendulum impact resistance of notched specimens of plastic.” ASTM D256 Philadelphia.
2. ASTM. (1992). “Standard test methods for flexural properties of unreinforced and reinforced plastics and electrical insulating materials—Method I.” ASTM D790 Philadelphia.
3. ASTM. (1994). “Standard practice for outdoor weathering of plastics.” ASTM D1435 Philadelphia.
4. British Standard Institution (BSI). (1994). “Specification for white PVC-U extruded hollow profiles with heat welded corner joints for plastic windows: Materials type A.” BS 7413 London.
5. Hachich V. C. F. (1999). “Minimum criteria for evaluation of rigid poly (vinyl chloride) (PVC) products for exterior use in buildings.” Ph.D. thesis Polytechnic School Univ. of São Paulo São Paulo Brazil.