1. Guoxian Li, Hypothesis on Blood Viscosity Syndrome (Clinical Blood Viscosity Syndrome), International Workshop of Clinical Blood Viscosity Syndrome, USA, 1995.
2. Qing Liu and Qun Liu, Approximate Reasoning Based on Granular Computing in Granular Logic, The Proceedings of ICMLS2002, Nov. 4–6, 2002.
3. A. Skowron and J. Stepaniuk, Extracting Patterns Using Information Granules, Proceedings of International workshop on Rough Set Theory and Granular Computing (RSTGC-2001), Bulleting of International Rough Set Society, Vol. 5, No. 1/2, May 20–22, 2001, 135–142.
4. Qing Liu, Neighborhood Logic and Its Data Reasoning in Information Table of Neighborhood Values, Journal of Computer (in Chinese), Vol. 24, No. 4, 2001, 4.