PEP Intermedius is a network of cash merchants that serves as the bridge for unbanked customers and the financial system.
Out of thin air, The behind-the-scenes logistics of Kenya’s mobile-money miracle,
The Economist, June 10th, 2010

Based on the academic paper Bridges to Cash: The Retail End of M-PESA, English weekly magazine The Economist wrote an in-depth article in which PEP Intermedius was mentioned.

Banking on mobile phones_ Out of thin air _ The Economist