🚀 go-pugleaf

Here is a problem I am having getting EndNote to assign "a" and "b"

correctly to publications with the same author, year, and journal. I would like
 to list the papers in the order they appeared (back to back) in the journal,
 but EndNote insists on listing them with their titles in alphabetical order.
 Here is the specific problem I am having:

In-text citation:
 Frank and Westerfield, 1982a; Frank and Westerfield, 1982b

Formatted bibliography:
 Frank, E, and Westerfield, M (1982a) The formation of appropriate central and
 peripheral connexions by foreign sensory neurones of the bullfrog. J Physiol
 (Lond) 324: 495-505.
Frank, E, and Westerfield, M (1982b)  Synaptic organization of sensory and motor
 neurones innervating triceps brachii muscles in the bullfrog. J Physiol (Lond)
 324: 479-494.

Notice that since "formation" occurs in the alphabet before "Synaptic", EndNote
 lists the second paper first.

Any ideas?   Eric Frank