SQL*PLUS problem avoiding variable interpolation in strings

I have insert statements of the following kind in an SQL*PLUS script file

insert into table values ('Öffentlichkeit', 'Stra&zslig;e...

Now SQL*PLus takes the SGML entities as variables to be interpolated. Is there anyway I can stop it from doing this? Escaping with \ or doubling the & doesn't help.

dave

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David-Michael Lincke	Institute for Information Management at USG
EMail: dlincke_at_sgcl1.unisg.ch
URL: http://www-iwi.unisg.ch/about/team/dal.html