1. Boger DV (1977) Nature 265:127
2. British Standard 5168 (1975) Glossary of Rheological Terms
3. Cross MM (1965) J Coll Sci 20:417
4. Lenge W, Rehage G (1980) In: Astarita G, Marrucci G, Nicolais L (eds) Rheology. vol 2, Plenum Press, p 354
5. Scott Blair GW (1933) J Applied Phys 4:113