1. R.E. Kesting, Synthetic Polymeric Membranes: A Structural Perspective, 2nd ed., Wiley/Interscience, New York, 1985
2. Microporous polypropylene sheets;Mizutani;Ind. Eng. Chem. Res.,1993
3. R.W. Gore, Process for producing porous products, US Patent 3 953 566, 1976
4. Microcellular polymers: novel materials for the 21st century;Kumar;Progress in rubber and plastics technology,1993
5. Generation of microcellular polymers using supercritical CO2;Goel;Cellular Polymers,1993