G. Kroonen, G. Barjamovic, M. Peyrot, Linguistic supplement to Damgaard et al. 2018: Early Indo-European Languages, Anatolian, Tocharian and Indo-Iranian. 10.5281/zenodo.1240524 (9 May 2018).
LINK:
https://zenodo.org/record/1240524#.WyYzxaczZjG
This is what anthrogenica user Ryukendo wrote about this supplement:
The authors of the supplement summarise the literature on the topic:
1) There is no consensus on the Balkan or Caucasian route for the Anatolian languages, though there are arguments that lead to a preference for the Balkan route among some linguists.
2) The languages are diverged for at least a millenium before we get the written records of their varieties (Palaic, Luwian, Hittite etc)
3) The linguistic evidence does not indicate mass migration or elite conquest, because the language characteristics are relatively in line with the language area, rather it appears "diffusional".
4) New evidence is presented from the Eblaite state with personal names from "Armi" (we don't know where that is, probably a statelet under the control of Ebla) with Anatolian derivation, in the Turkey-Syria border, 500 years before the earliest attestation of the other Anatolian languages in 2500BC (which therefore push the split of the language group even further back). These personal names also appear in Assyrian records about trade with "Armi". These names occur contemporaneous with Yamnaya, so the hypothesis that even Anatolian derives from Yamnaya can be safely rejected.