1. Anonymous 2018. SciPy Reference Guide Release 1. 1.0.dev-659017f, p. 2481, https://docs.scipy.org/doc/scipy/scipy-ref-1.1.0.pdf [last accessed 5 December 2018].
2. Anonymous 2019. PyKrige Documentation Release 1.4.1, p 52, https://buildmedia.readthedocs.org/media/pdf/pykrige/latest/pykrige.pdf [last accessed 16 April 2019].
3. ASTM 2015. Standard Guide for Risk-Based Corrective Action Applied at Petroleum Release Sites. Active Standard ASTM E1739. American Society for Testing and Materials, West Conshohocken, PA, https://www.astm.org/Standards/E1739.htm
4. Bonn Agreement 2017. Aerial Operations Handbook, Part 3, Annex A. The Bonn Agreement Oil Appearance Code, https://www.bonnagreement.org/site/assets/files/1081/special_on_volume_calculation_20160607.docx
5. A simple analytical formula for the leakage flux through a perforated aquitard;Bonte;Groundwater,2015