author= {Botros, Rami and Irie, Kazuki and Sundermeyer, Martin and Ney, Hermann},
title= {On Efficient Training of Word Classes and Their Application to Recurrent Neural Network Language Models},
booktitle= {Interspeech},
year= 2015,
pages= {1443-1447},
address= {Dresden, Germany},
month= sep,
booktitlelink= {http://www.interspeech2015.org},
pdf = {https://www-i6.informatik.rwth-aachen.de/publications/downloader.php?id=985&row=pdf}