Burgess, C. & Lund, K. (1998, under review). The dynamics of meaning in memory. In Dietrich & Markman (Eds.), Cognitive Dynamics: Conceptual Change in Humans and Machines.
Available in PDF format (129KB)
There is also a section on comparing HAL with recurrent networks, and some good discussion on exactly "what are HAL's vectors, anyway?"
You should download this one right now!