"Chemically Crosslinked Polyethylene Foam", Yoshio Kadowaki, Wayne State Polymer Conference, Cellular Plastics, May, 1967.
2.
"Modified PE Foam Systems-Part I", Benning, C. J., Journal of Cellular Plastics, February, 1967.
3.
"Physical Property Modifications of Low Density Polyethylene Foam", Skochdopole, R. E., and Rubens, L. C., Journal of Cellular Plastics , January, 1965.
4.
"Foaming Agents for Polyolefins", Lasman, H. R., SPE Journal, 18, 1184-91 (1962).