@inproceedings{Gregori:2000ab, author = "Gregori, Andrea", title = "{Non-perturbative string connections}", doi = "10.22323/1.004.0021", booktitle = "Proceedings of Quantum aspects of gauge theories, supersymmetry and unification {\textemdash} PoS(tmr99)", year = 2000, volume = "004", pages = "021" }