I just came across a recent publication:
Living through Literature: Essays in Memory of Omry Ronen, Upsalla University, 2019.
It contains three essays on VN:
Nabokov's First English Language Novel in the Context of the Anglo-American Prose of His Contemporaries, by Irena Ronen
Kinbote's Remorse, by Nancy Pollak
The Pleasure of Translingual Punning: Homage to Nabokov in Olga Grushin's The Dream Life of Sukhanov, by Julie Hansen
Here is the link to the full-text online: https://www.diva-portal.org/smash/get/diva2:1268970/FULLTEXT01.pdf