4Harris P C. Chemistry and Bheology of Borate Crosslinked Fluids at Temperatures Up to 300. SPE 24339, 1993
5Almond,S.W.,Bland,W.E.and Ripley,H.E.:"The Effect of Break Mechanisms on Gelling Agent Residue and Flow Impairment in 20/40 Mesh Sand," paper CIM 84-35-30,presented at the 35th Annual Technical Meeting of Petroleum Society of CIM and Canadian Association of Drlling Engineers,Calgary,Alberta,Canada (June 10-13,1984).
6Gall,B.L.and Raible,C.J.:"Molecular Size Stuides of Degraded Fracturing.Fluid Polyments," paper SPE 13566,presented at the SPE Olifield and Geothermal Chemistry Symposium,Phoenix,Arizona,USA(April 9-11,1985).
7Harold D.Brannnon,ect.Enzyme Breaker Technologies:A Decade of Improved Well Stimulation.5-8 October 2003.SPE84213.
8Joshi Neeti Vishnukumar,ect.Enhanced Coal Bed Methane Recovery Using Nitrogenase Enzyme.11-14 November 2007.SPE113033.
