- Open Problem Garden
- Sloane's database - an online encyclopedia of integer sequences. Great stuff! Try a sequence you want.
- JStor - an online library with an acces to a huge amount of journals
- WolframMathWorld - for those who are searching for small and precise definitions of some mathematical objects with examples
- ISGCI - Graph Classes and their Inclusions
- Graph Drawer
- Journal of Combinatorial Theory Series B
- Journal of Graph Theory
- European Journal of Combinatorics
- Discrete Mathematics
- Discrete Applied Mathematics
- Information Processing Letters
- Electronic Notes in Discrete Mathematics
- Journal of Mathematical Modelling and Algorithms
Journals
- Graphs & Applications
- RealOpt
Working Groups