This year Joseph Bermudez, a military analyst for Jane’s Intelligence Review and author of The Armed Forces of North Korea, launched a journal dedicated to the discussion of the DPRK military: KPA Journal.
Volume 1, No. 2 contains articles on the 1st Engineer River Crossing Regiment and the KN-02 SRBM (Short Range Ballistic Missile). You can download it here.
You can download the inaugural issue here. Both have been added to my burgeoning “DPRK Military Resources” page.