1. J.W. Cannon, G.R. Conner, On the fundamental groups of one dimensional spaces, Preprint
2. The big fundamental group, big Hawaiian earrings, and the big free groups;Cannon;Topology Appl.,2000
3. The combinatorial structure of the Hawaiian earring group;Cannon;Topology Appl.,2000
4. One-dimensional sets and planar sets are aspherical;Conner;Topology Appl.,2002
5. G.R. Conner, K. Eda, Fundamental groups having the whole information of spaces (tentative), Preprint