As Birchswing said I'm not exactly sure what you're looking for specifically, I've found plenty of articles talking about enmeshment in all sorts of circumstances - boundary violations, dual relationships, anorexia nervosa, panic disorder, schizophrenia, therapy outcomes, etc etc etc (most of which seem to just have 'enmeshment' as a key word not an actual topic) - but I don't exactly want to just throw a heap of potentially meaningless articles at you. If you try the Tor browser (just Google 'Tor Browser', you'll need to have Firefox installed to actually run it) and then copy past any of these .onion urls into the address bar once the Tor browser is up and running (should be fairly simple to set up, just download, install, include desktop folder, click on said folder and go to the little onion symbol that says Tor browser, double click on that and then 'connect'), it should give you some enhanced search capabilities for academic interest or research - although still no guarantee you'll find what you're looking for.
I've only included clean (ie safe) dot onion url search engines in this list.
3g2upl4pq6kufc4m.onion/ – DuckDuckGo Search Engine
xmh57jrzrnw6insl.onion/ – TORCH – Tor Search Engine
32rfckwuorlf4dlv.onion/ – Onion URL Repository
e266al32vpuorbyg.onion/bookmarks.php – Dark Nexus
5plvrsgydwy2sgce.onion/ – Seeks Search
2vlqpcqpjlhmd5r2.onion/ – Gateway to Freenet
j6im4v42ur6dpic3.onion/ – TorProject Archive
p3igkncehackjtib.onion/ – TorProject Media
kbhpodhnfxl3clb4.onion – Tor Search
dppmfxaacucguzpc.onion/ – TorDir – One of the oldest link lists on Tor
Good luck, again not sure if this will help but at least it may give you a chance to widen your scope.
