author= {Kneser, Reinhard and Ney, Hermann},
title= {Improved clustering techniques for class-based statistical language modelling},
booktitle= {European Conference on Speech Communication and Technology},
year= 1993,
pages= {973-976},
address= {Berlin, Germany},
month= sep,
pdf = {https://www-i6.informatik.rwth-aachen.de/publications/downloader.php?id=950&row=pdf}