1. AER, Alberta Energy Regulator (1990) Directive 009: guide to minimum requirements for cementing intermediate or production casing, multiple editions. Energy Resources Conservation Board, Calgary, Alberta, Canada, 17p
2. AER, Alberta Energy Regulator (2009) Directive 010: minimum casing design requirements. Energy Resources Conservation Board, Calgary, Alberta, Canada, 25p
3. AER, Alberta Energy Regulator (2016) Directive 020: well abandonment. Energy Resources Conservation Board, Calgary, Alberta, Canada, 56p
4. API, American Petroleum Institute (2000) Environmental guidance document: well abandonment and inactive well practices for U.S. exploration and production operations. API Bulletin E3
5. API, American Petroleum Institute (2002) Specification for cements and materials for well cementing. API specification 10A twenty-third edition, April 2002. ANSI/API 10A/ISO 10426-1-2001