How do I index an author who published articles with and without middle initial? For example, I cite an author who published as
J. Bloggs, An important paper, Some Journal, 1993
J. Z. Bloggs, Another important paper, Some Journal, 1995.
When I create the corresponding entries in the author index, should I refer from one to the other [e.g., Bloggs, J. (see also Bloggs, J. Z.)] or do I create both entries with the middle initial? Are there official rules for this situation? (Yes, I am sure that they are the same person.)