1. API RP 11L (1988) Recommended practice for design calculation for sucker rod pumping system, 4th edn., June
2. API Specification 11B (1980) Specification for sucker rods, 18th edn., January
3. API Specification 11AX (2015) Subsurface sucker rod pump assemblies, components, and fittings, 13th edn. American Petroleum Association
4. Baker Hughes—A GE Company (2018) Lufkin beam pumping units. Conventional and reverse Makr. Installation and operations manual
5. Brown K (1980) The technology of artificial lift methods, vol 2a. PennWell Publishing Company, Tulsa, OK