John Collins Maksim Tsvetovat Rashmi Sundareswara Joshua van Tonder Maria L. Gini Bamshad Mobasher Evaluating Risk: Flexibility and Feasibility in Multi-Agent Contracting. 350-351 1999 Agents http://doi.acm.org/10.1145/301136.301229 db/conf/agents/agents99.html#CollinsTSTGM99