Ching-Nung Yang, Chih-Cheng Wu, Chih-Yang Chiu, Shin Yan Chiou, Wen-Chiuan Liao. Micropayment schemes with ability to return changes. In Gabriele Kotsis, David Taniar, Eric Pardede, Ismail Khalil Ibrahim, editors, iiWAS 2009 - The Eleventh International Conference on Information Integration and Web-based Applications and Services, 14-16 December 2009, Kuala Lumpur, Malaysia. pages 356-363, ACM, 2009. [doi]
Abstract is missing.