1. Global Insurance Premiums Exceed $5 Trillion for the First Timehttps://www.captive.com/news/2019/07/09/global-insurance-premiums-exceed-5-trillion
2. World Development Indicatorshttps://en.wikipedia.org/wiki/List_of_countries_by_GDP_(nominal)
3. Encyclopedia Britannica, Historical Development of Insurancehttps://www.britannica.com/topic/insurance/Historical-development-of-insurance
4. Burial places and funeral ceremonies;Johnston,1903
5. Institutional Bases of the Spontaneous Order: Surety and Assurance;Loan;Hum. Stud. Rev.,1991