1. Berge C (1962) The theory of graphs (original title: The theory of graphs and its applications). Dover 2001 (originally published by Wiley 1962). Translated from a French edition by Dunod, 1958
2. Bisdorff R (1996) On computing kernels on fuzzy simple graphs by combinatorial enumeration using a CPL
3. (FD) system. In: 8th Benelux workshop on logic programming, Louvain-la-Neuve (BE), 9 September 1996, Université catholique de Louvain. http://hdl.handle.net/10993/46933
4. Bisdorff R (1997) On computing kernels on l-valued simple graphs. In: Proceedings of EUFIT’97, 5th European congress on fuzzy and intelligent technologies, Aachen, September 8–11, 1997, pp 97–103
5. Bisdorff R (2000) Logical foundation of fuzzy preferential systems with application to the electre decision aid methods. Comput Oper Res 27:673–687. http://hdl.handle.net/10993/23724