"Dag Stenberg" <dag.stenberg at nospam.helsinki.fi.invalid> wrote in message
news:b5l7rd$2mb$1 at oravannahka.helsinki.fi...
> I would be very surprised if these articles do not also list the
> previous relevant literature in the matter. I would be very cautious
> about any pre-1990 literature. It is bound to be quite inexact.
Although you did not address me --- thanks for the hint! %->