Before revision:  This work proposes a self-training strategy where the output of the backward model is used to improve the model itself through the forward translation technique. The technique was shown to improve baseline low resource IWSLT'14 English-German and IWSLT'15 English-Vietnamese backward translation models by 11.06 and 1.5 BLEUs respectively.
After revision:  This work proposes a self-training strategy where the output of the backward model is used to improve the backward model through forward translation and the forward model through back-translation. Experimental results on English-German and IWSLT'15 English-Vietnamese backward translation models by 11.06 and 1.5 BLEUs respectively.