1. Kessick , M.A. , Earl , C. , and Deais , S. ( 1982 ) Pipeline Transportation of Heavy Crude Oil. U.S. Pat. No. 4, 343, 323.
2. Storm , D.A. ( 2001 ) Method for Reducing the Pipeline Drag of Heavy Oil and Compositions Useful Therein. U.S. Pat. No. 6,178,980 B1.
3. McMillen , J.M. ( 1985 ) Method of Solvent Stimulation of Heavy Oil Reservoirs. U.S. Pat. No. 4,531,586.
4. Bain , R.L. , Larson , J.R. , Gertenbach , D.D. , Gillespie , D.W. and Leto , J.J. ( 1988 ) Viscosity Reduction Processing at Elevated Pressure. U.S. Pat. No. 4,778,586.
5. Review of oil water core annular flow