Papers

Ripple Papers

Money as IOUs in Social Trust Networks & A Proposal for a Decentralized Currency Network Protocol - The original Ripple paper. Ryan Fugger (2004)
Payment as a Routing Problem - How Ripple is to money what the Internet is to information. Ryan Fugger (2006)
Security and Routing in the Ripple Payment Network - Jan Michelfeit's Master's Thesis
The General Theory of a Ripple-like Credit Transfer System [Link may be slow or inaccessible due to Tor proxy.] Shew (2010)

Related Work

Principles for a free, powerful and stable monetary system for the digital era - Sylvain Poirier's independently conceived idea
Mechanism Design on Trust Networks Arpita Ghosh, Mohammad Mahdjan, Daniel M Reeves, David M Pennock, Ryan Fugger (2007)
Liquidity in Credit Networks: A Little Trust Goes a Long Way Pranav Dandekar, Ashish Goel, Ramesh Govindan, Ian Post (2010)
TrustDavis: A Non-Exploitable Online Reputation System Dimitri do B. DeFigueiredo, Earl T. Barr (2005)