1. Integrated databases for the utility engineering environment;Armstrong;Rural Electric Power Conference,1992
2. Hydraulic Modeling and GIS;Armstrong,2011
3. ASCE 38-02, 2002. Standard Guideline for the Collection and Depiction of Existing Subsurface Utility Data, American Society of Civil Engineers, Reston, VA.
4. Beck, A, Cohn, A.G., Parker, J., Boukhelifa, N., Fu, G., 2009. Seeing the Unseen: Delivering Integrated Underground Utility Data in the UK, ISPRS Archives – Volume XXXVIII-3-4/C3.
5. Bentley, 2014. (Website showing various Bentley software user case studies).