After exploring the realm of primary sources, I am now charged with reporting what I can find in terms of secondary sources. Using what I can locate in databases such as JSTOR, EBSCO, and ITER, I have attempted to narrow the list to those which are most pertinent. Some of these sources are not in English, but I did my best to find the most significant and relevant modern secondary sources on the subject of St. Agnes or the larger scope of female or virginal saints. Furthermore, many of these sources are focused on works of art, architecture, poetry, etc. which were created to celebrate the saint or tell her story. Where possible, I have also obtained a stable domain or web address to locate these works.
That said, my bibliography:
Angelova, Diliana. Sacred Founders: Women, Men, and Gods in the Discourse of Imperial Founding, Rome Through Early Byzantium. Oakland: University of California Press, 2015. https://search.ebscohost.com/login.aspx?direct=true&AuthType=sso&db=rfh&AN=ATLAiBCB170710002097&site=eds-live.
Baert, Barbara, translated by Irene Schaudies. “More than an Image: Agnes of Rome: Virginity and visual memory.” Annua nuntia Lovaniensia, vol. 51. Published by Peeters, Dudley, MA (2005): 139-168.
Bernard, Jean-Francois and Paola Ciancio Rossetto. “Le stade de Domitien: situation topographique, etude architecturale et reflexions concernant la localisation de l’eglise Sainte-Agnes.” Mélanges de l’Ecole française de Rome. Moyen âge vol. 126 no. 1 (2014): 75-92.
Clark, Elizabeth A. (Elizabeth Ann). “Ascetic Renunciation and Feminine Advancement: A Paradox of Late Ancient Christianity.” Anglican Theological Review 63, no. 3 (July 1981): 240–57. https://search.ebscohost.com/login.aspx?direct=true&AuthType=sso&db=rfh&AN=ATLA0000786675&site=eds-live.
Hansen, Maria Fabricius, and Barbara J. Haveland. “Sant’Agnese Fuori Le Mura.” In The Spolia Churches of Rome: Recycling Antiquity in the Middle Ages, 100-11. Aarhus N: Aarhus University Press, 2015. http://www.jstor.org/stable/j.ctv62hgp6.11.
Lanery, Cecile. “La legende de sainte Agnes: quelques reflexions sur la genese d’un dossier hagiographique (IVe-VIe s.).” Mélanges de l’Ecole française de Rome. Moyen âge vol. 126 no. 1 (2014): 17-26.
Lapidge, Michael. The Roman Martyrs: Introduction, Translations, and Commentary. (Oxford Early Christian Studies.)Oxford: Oxford UP, 2018.
Malamud, Martha A. “Saint Agnes and the Chaste Tree.” In A Poetics of Transformation: Prudentius and Classical Mythology, 149-80. Cornell University Press, 1989. http://www.jstor.org/stable/10.7591/j.cttq44p9.12.
McDaniel, Rhonda L. “Agnes among the Anglo-Saxons: Patristic Influences in Anglo-Latin and Anglo-Saxon Versions of the Passio of St Agnes, Virgin and Martyr.” In Writing Women Saints in Anglo-Saxon England, edited by Szarmach Paul E., 217-48. Toronto; Buffalo; London: University of Toronto Press, 2013. http://www.jstor.org/stable/10.3138/j.ctt5hjvgx.14.
Messenger, Ruth Ellis. “The Legend of St. Agnes in Early Latin Hymns.” The Classical Weekly 37, no. 7 (1943): 75. doi:10.2307/4341811.
Mueller, Joan. “Clare of Assisi and the Agnes Legend: a Franciscan Citing of St. Agnes of Rome as Mulier Sancta.” Studies in Spirituality, vol. 8, (1998): 141-161.
Muir, Carolyn Diskant. “Love and Courtship in the Convent: St. Agnes and the Adult Christ in Two Upper Rhine Manuscripts.” Gesta 47, no. 2 (2008): 123-45. doi:10.2307/20648967.
Muir, Carolyn Diskant. “St Agnes of Rome as a Bride of Christ: A Northern European Phenomenon, C. 1450-1520.” Simiolus: Netherlands Quarterly for the History of Art 31, no. 3 (2004): 135-55. doi:10.2307/4150585.
Phillips, Christine. “St Agnes of Rome: a review of the Latin sources employed for her entry in the Old English Martyrology.” Notes and Queries, vol. 58, no. 2, (2011): 177-181.
Ryan, William Granger, and Eamon Duffy. “Saint Agnes, Virgin.” In The Golden Legend: Readings on the Saints, 101-04. PRINCETON; OXFORD: Princeton University Press, 2012. doi:10.2307/j.ctt7stkm.29.
Stillinger, Jack. “The Text of “The Eve of St. Agnes”.” Studies in Bibliography 16 (1963): 207-12. http://www.jstor.org/stable/40371361.
Weetman, S. A. H. “Clemens Brentano’s Treatment of the Legend of Saint Agnes.” The Modern Language Review 45, no. 2 (1950): 228-34. doi:10.2307/3719445.
Williamson, Christine. “Bede’s hymn to St. Agnes of Rome: the Virgin martyr as a male monastic Exemplum.” Viator, vol. 43, no. 1, (2012): 39-66.
Wirbelauer, Eckhard. “Agnes et les eveques de Rome jusqu’au VIIe siecle: un plaidoyer pour une relecture historico-critique du Liber pontificalis.” Mélanges de l’Ecole française de Rome. Moyen âge vol. 126 no. 1 (2014): 125-136.
Omnia Disce 