Newman, Charles M.; Wu, Wei. Gaussian fluctuations for the classical XY model. Ann. Inst. H. Poincaré Probab. Statist. 54 (2018), no. 4, 1759--1777.
Newman, Charles M.; Wu, Wei. Gaussian fluctuations for the classical XY model. Ann. Inst. H. Poincaré Probab. Statist. 54 (2018), no. 4, 1759--1777.