Source: https://www.researchgate.net/profile/Stephanie-Lehuger/publication/326534309_The_social_franchise_a_relevant_business_model_for_development_aid_policy_Challenges_with_access_to_safe_drinking_water_in_rural_areas_in_developing_countries/links/5b52ee7ea6fdcc8dae3494fc/The-social-franchise-a-relevant-business-model-for-development-aid-policy-Challenges-with-access-to-safe-drinking-water-in-rural-areas-in-developing-countries.pdf