Here is a new article that is tangentially pertinent to Hebrews study:
Stuckenbruck, Loren T. “Melchizedek in Jewish Apocalyptic Literature.” Journal for the Study of the New Testament 41.1 (2018): 124–38.
"The study of especially apocalyptic traditions from the Second Temple period that are concerned with the figure of Melchizedek throws light on a vitality of interest that presupposes but is no longer simply dependent on the pre-texts of Gen. 14 and Ps. 110 in the Hebrew Bible. Although the epistle to the Hebrews is clearly influenced by these pre-texts, the latitude its author takes in focusing on Jesus as both priest ‘after the order of Melchizedek’ and as Son may be said to have been shaped by the kind of creative and imaginative engagement with tradition reflected in other Second Temple texts."