1. J. C. Randall, “Characterization of long chain branching in polyethylenes using high-field carbon 13 NMR,” in: “Polymer characterization by ESR and NMR,” p. 94-118
2. K. Shirayama, T. Okada, and S. Kita, J. Polym. Sci., Part A 3, 907 (1965).
3. R. Florin, R. Spitz, A. Douillard, A. Guyot, R. F. Boyer, L. R. Denny, and P. L. Kumler, Europ. Polym. J. 16, 1079 (1980).
4. V. F. F. Mathot and M. J. Pijpers, Polymer Bulletin 11, 297 (1984).
5. Kavesh and Schultz, J. Polym. Sci. A2, 8, 243 (1970).