1. Levin P (1998) Construction contract claims, changes, and dispute resolution. American Society of Civil Engineers
2. Contract FIDIC (1999) Federation Internationale des Ingenieurs Conseils
3. Moura HMP, Teixeira JMC (2007) Types of construction claims: a Portuguese survey
4. Designing Buildings Wiki, “Employer delay” (2019). https://www.designingbuildings.co.uk/wiki/Employer_delay
5. BIS (2013) Construction project management—guidelines