1. Well history file;AOGCC,2017
2. Wellbore anti-collision safety: separation distances must be increased due to degraded positioning accuracy in northern areas;Bang,2011
3. Targeting challenges in northern areas due to degradation of wellbore positioning accuracy;Bang,2009
4. Anti-collision considerations for arctic and other high latitude locations;Chatar,2015
5. MWD survey accuracy improvements using multistation analysis;Chia,2004