1. Über die Wärmeleitfähigkeit von Flüssigkeiten (On the conduction of heat in liquids);Graetz;Annalen der Physik NF,1983
2. Heat transfer to laminar flow in a round tube or flat conduit – The Graetz problem extended;Sellars;Transactions ASME,1956
3. Laminar Fluid Flow and Heat Transfer in Ducts (in Russian);Petukhov,1967
4. Laminar Forced Convection in Ducts, Supplement to Advances in Heat Transfer;Shah,1978
5. Handbook of Single-Phase Convective Heat Transfer;Kakaç,1987