Women on Roman coins  (coin sale catalogs and articles)

Malter  1984, Dec. 8.  MV. LQP. "TheVirginia Ruzicka Collection"  598 ancients and18 seals on 25 ppl (the paper is not high quality which affects the photos negatively).  189 women on coins (including 17 G, 166 R, and 4 Byz) plus 104 G, 85 RR, 211 RI & RP including some Roman Egyptian drachms,  9 Byz AE.
    coins issued for women (189)

Peus 374  (2003, April 23) 1269 ancients on 61 ppl plus 2 color ppl. MV. MQP. 139 G, 7 Elymais, 50 Parthian, 111 Sas, 247 RR (including 24 aes grave) 587 RI, 42 Byz AV, 1 Lombard, 101 Arabic and 70 lots.  Mentions an emphasis on "Women of the Caesars," but the emphasis is not very great.

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   "The later Roman empresses," by Jasper K. Burns.  (post Severan empresses to the end of empire)  in The Celator,  December 2005, pages 6, 8, 10, 12, 14, 16, 18, and 38.
(This is more a short history than an analysis of coin types.)