1. JEXNS, J.H., The Mathematical Theory of Electricity and ?hagnetism, Cambridge University Press, Cmbridge, 1963, pp.356-357.
2. CARSLAW, H.S. and JAEGER, J.C., Conduction of Heat in Solids, Oxford Univerzity Press, Iandon, 1959, pp.216-217.
3. Thermal contact conductance