Treatment of unaccusativity/unergativity in HPSG

[Bernard Lamers]

Dear HPSG-ers,

I was wondering whether someone on this list could provide me with
some leads to research on unaccusativity/unergativity in HPSG. I am
particularly interested in a formal account of the
unaccusative/unergative distinction in Japanese, but pointers to work
on the same phenomenon in other languages would be greatly appreciated
as well.

Thanks in advance,

Bernard Lamers