I just came across these dissertations on Hebrews in Italian:
MICHELE CICCARELLI, La sofferenza di Cristo nell'Epistola agli Ebrei: Analisi di una duplice dimensione della sofferenza: soffrire-consoffrire con gli uomini e soffrire-offrire a Dio (Associazione Biblica Italiana, Supplementi alla Rivista Biblica 49; Bologna: Dehoniane, 2008). Pp. 370.
This volume is based on his 2005 doctoral dissertation at the Pontifical Biblical Institute under the direction of Albert Vanhoye. Casimir Bernas reviews this volume in Catholic Biblical Quarterly 71 (2009): 397-398. He summarizes the thesis as follows: the author "expounds themes of the Epistle to the Hebrews dealing with the solidarity of Christ and Christians in their roles of priest and victim: Christ's sufferings are a share in the sufferings of human beings, who in turn are able to offer themselves to God as mediators in the manner of Christ. Their sufferings, like those of Christ (their model and head), have redemptive value" (397).
FILIPPO URSO, "Imparò L'Obbedienza dalle Cose Che Patì " Eb 5,8: Il valore educativo della sofferenza in Gesù e nei cristiani nella Lettera agli Ebrei (Tesi Gregoriana: Serie Teologia 119; Rome: Editrice Pontificia Università Gregoriana, 2005). Pp. 509.
This volume is based on the author's 2004 doctoral dissertation at the Gregorian University also directed by Albert Vanhoye. According to Edward L. Bode in his review in Catholic Biblical Quarterly 68 (2006): 350-352, it "explores the educational value of suffering for Jesus and Christians in the Letter to the Hebrews" (350).
Urso also has this book based on his dissertation: La sofferenza educatrice nella Lettera agli Ebrei.
FULVIO DI GIOVAMBATTISTA, Il Giorno dell'Espiazione nella lettera agli Ebrei (Tesi Gregoriana, Serie Teologia 61; Rome: Editrice Pontificia Università Gregoriana, 2000). Pp. 223.
This work is based on the author's 2000 dissertation at the Pontifical Gregorian University under the direction of R. Neudecker and S. Brodeur. It explores the Day of Atonement as the background to Hebrews. Sean P. Kealy reviews the book in Catholic Biblical Quarterly 63 (2001): 740-741.
FRANCO MANZI, Melchisedek e l'angelologia nell'Epistola agli Ebrei e a Qumran, AnBib 136. Rome: Editrice Pontificio Istituto Biblico, 1997. Pp. xviii + 434.
This book is based on the author's 1996 dissertation at the Pontifical Biblical Institute, directed by Albert Vanhoye. Casimir Bernas reviews the book in Journal of Biblical Literature 118 (1999): 368-370. He says that "Manzi investigates possible literary and theological influences of Melchizedek-ideology at at Qumran upon the letter to the Hebrews" (368). It is also reviewed by George J. Brooke in Catholic Biblical Quarterly 60 (1998): 770-771.