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Bögli, M.; Niedermayer, F.; Pepe, M.; Wiese, U.-J. (2012). Non-trivial θ-vacuum effects in the 2-d O(3) model. Journal of High Energy Physics, 2012(4) Berlin: Springer 10.1007/JHEP04(2012)117
Balog, J.; Niedermayer, F.; Pepe, M.; Weisz, P.; Wiese, U.-J. (2012). Drastic reduction of cutoff effects in 2-d lattice O(N) models. Journal of High Energy Physics, 2012(11) Berlin: Springer 10.1007/JHEP11(2012)140
