1. Ostrach , Simon April, 1954
2. Convective Heat Transfer and Flow Friction Behavior of Small Cylindrical Tubes-Circular and Rectangular Cross Section;Kays;Trans. A.S.M.E.,1952
3. Marco , S. M. Han , L. S. A Note on Limiting Laminar Nusselt Number in Ducts With Constant Temperature Gradient by Analogy to Thin Plate Theory June, 1954
4. Pierce , B. O. A Short Table of Integrals