1. Bekarevich, I. L., and Khalatnikov, I. M. (1961).Soviet Physics JETP,13, 643?648.
2. Flanders, H. (1963).Differential Forms with Applications to the Physical Sciences, Academic Press, New York.
3. Hall, H., and Vinen, W. (1956).Proceedings of the Royal Society A,238, 215?234.
4. Moffat, H. K. (1969).Journal of Fluid Mechanics,35(1), 117?129.
5. Moffat, H. K. (1981).Journal of Fluid Mechanics,106 (Special Issue).