1. Laws for flow in rough pipes;Nikuradse;NACA TM 1292,1950
2. The friction and heat-transfer coefficients of rough pipes;Cope,1941
3. Heat transfer and pressure drop in rough tubes;Nunner;AERE Lib/Trans. 786,1958
4. Experimental investigation of average heat transfer and friction coefficients for air flowing circular pipes having square-thread type roughness;Sams;NACA RM-E 52-D17,1952
5. Heat transfer and pressure drop characteristics at internal finned tubes;Brouillette;ASME paper 57-A-47,1957