Methods for Smoothing the Optimizer Instability in SMT Mauro Cettolo author Nicola Bertoldi author Marcello Federico author 2011-sep 19-23 text Proceedings of Machine Translation Summit XIII: Papers Xiamen, China conference publication cettolo-etal-2011-methods https://aclanthology.org/2011.mtsummit-papers.1/ 2011-sep 19-23