1. & , in Kirk-Othmer Encyclopaedia of Chemical Technology, 2nd supp. Vol. Wiley-Interscience, New York, 1960, pp. 597–609.
2. Degradation of drag-reducing polymers
3. in Kirk-Othmer Encyclopaedia of Chemical Technology, Vol. 10. Wiley-Interscience, New York, 1982, p. 232.
4. & , in Encyclopaedia of Polymer Science and Technology, Vol. 6, ed. Wiley-Interscience, New York, 1967, p. 103.
5. US Pat. 3,999,358 (1976).