A new article on Hebrews (available on Academia.edu):
Wenkel, David H. “Sensory Experience and the Contrast between the Covenants in Hebrews 12.” Bibliotheca Sacra 173 (2016): 219–34.
"Studies of the contrast between Mount Sinai and Mount Zion in Hebrews 12:18–24 have overlooked the key element of sensory experience. On this basis two propositions are set forth. First, the Mosaic covenant is a covenant of the senses because Mount Sinai was unapproachable yet perceivable by the senses. Second, the new covenant’s Mount Zion is superior because it is unperceivable by the five senses while being approachable."