Bertjan Busser Walter Daelemans Antal van den Bosch Machine learning of word pronunciation: the case against abstraction. 1999 EUROSPEECH https://doi.org/10.21437/Eurospeech.1999-530 conf/interspeech/1999 db/conf/interspeech/eurospeech1999.html#BusserDB99 2123-2126