Thanks Waterlogged, you jogged my memory. Yaku, I would look up "David Wallin" and "John Briere" on Youtube, both of them have talks available. John Briere is an expert on healing trauma and touches on attachment also. I also found a couple of articles I had that I've attached to this post.
Great interview of David Wallin on Psychotherapy.net David Wallin on Attachment and Psychotherapy