1. Steady flow in the transition length of a straight tube;Langhaar;J. Appl. Mech.,1942
2. Numerical solutions for laminar-flow heat transfer in circular tubes;Kays;Trans. Amer. Soc. Mech. Engrs,1955
3. Mass transfer in the entrance length of a pipe-laminar flow;Bosworth,1962
4. Heat transfer with laminar flow in concentric annuli with constant heat flux and simultaneously developing velocity arid tempsrature distributions;Heaton,1962