1. https://www.tmforum.org/blockchain-based-telecom-infrastructure-marketplace/
2. https://www.itu.int/ITU-D/finance/work-cost-tariffs/events/tariff-seminars/niger-01/Doc7-Lacroix-%20Evolution%20of%20Inter%20Carrier%20Settlement-En.pdf
3. https://medium.com/@ygiokas/blockchain-powered-inter-carrier-orchestration-723dbb5f40db