This paper uses TeX(3.14t3) plus the jnl macro pakage.  If you don't 
have a copy of jnl.tex then you can obtain one by sending an e-mail
message to hep-th@xxx.lanl.gov with the line
 get jnl.tex
as the subject (and nothing in the body) of the message.  

jnl.tex defines \square but you may like to try another (slightly
prettier) definition.  In that case you should decomment the first 3
lines following the:
"\input jnl"
as they provide an alternative definition of the symbol for the 
d'Alembertian operator.

If you don't want the doublespaced version, comment out the
\doublespace command at the start of the abstract.

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