1. Carslaw HS, Jaeger JC (1973).Conduction Of Heat In Solids, Chap. II, pp. 62–75. Clarendon Press, Oxford.
2. Tan KK (1994). Gas diffusion into viscous and non-Newtonian liquids and the onset of convection. Ph.D. Dissertation, Department of Chemical Engineering, University of Cambridge, 177–179.