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2. Soft matter: more than words
3. CRC Handbook of Chemistry and Physics, ed., D. R. Lide, CRC Press, Boca Raton, FL, 81st edn., 2000, p9-81–9-86
4. CRC Handbook of Chemistry and Physics, ed., D. R. Lide, CRC Press, Boca Raton, FL, 81st edn., 2000, p12-211–12-212
5. CRC Handbook of Chemistry and Physics, ed., D. R. Lide, CRC Press, Boca Raton, FL, 81st edn., 2000, p4-141–4-148