1. – French engineer, physicist and mathematician. The author of basic works on civil engineering, mechanics, strength of materials, theory of elasticity and fluid dynamics. The publication on the subject under discussion is: H. Navier;Navier;Mém. de l'Acad. des Sciences,1823
2. – English mathematician and physicist, the author of fundamental works on optics, spectroscopy, gravitation, fluid dynamics and vector analysis. The publications related to the subject under discussion are: J.G. Stokes;Stokes;Trans. Cambridge Phyl. Soc.,1845
3. Sometimes this value is called a dynamic viscosity in order to distinguish it from kinematic viscosity, defined as the ratio of η to density of liquid.
4. On the coefficient of viscous traction and its relation to that of viscosity
5. P.J.W. Debye (1884-1966) – an outstanding Dutch physicist, graduated and worked in Germany and in the US from 1940. He is an author of numerous works on quantum mechanics of solids at low temperatures, X-ray analysis of polycrystals, molecular physics, and application of physical methods to chemistry. Nobel prize in chemistry (1936).