This is BibTeX, Version 0.99d
Capacity: max_strings=35307, hash_size=35307, hash_prime=30011
The top-level auxiliary file: expr.aux
The style file: expr.bst
"}" can't start a style-file command---line 5 of file expr.bst
 : 
 : }
(Error may have been on previous line)
(There was 1 error message)