M. Suo, and P. Griffith. Technical Report, 8581-24. Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Mass., (March 1963)
P. Rapolu, and S. Son. Proceedings of the 18th International Symposium on Transport Phenomena, volume Volume 8: Heat Transfer, Fluid Flows, and Thermal Systems, Parts A and B of IMECE2007, page 1039-1045. ASME, (January 2007)