some other papers for bird identification by bones:
Jenő (Eugen) Kessler, 2016. Picidae in the European fossil, subfossil and recent bird faunas and their osteological characteristics. Ornis Hungarica. 24(1) 96–114,, DOI: https://doi.org/10.1515/orhu-2016-0006
Jenő (Eugen) Kessler 2015. Osteological guide of songbirds from Central Europe. – Ornis Hungarica 23(2): 62–155. DOI: 10.1515/orhu-2015-0016
I can confirm that the series of papers published by Eulalia Moreno on identification of Iberian passerines by bones is very good. Apart from the two titles cited by Andrea Minganti there is a third and last paper on the Muscicapidae, published like the others in the journal ARDEOLA. There also some other papers on the subject, centred on the identification of shorebirds and ducks by the skull, which I attach in this message. They are really good and useful.
There are some pubblications about passerine skulls and very few things about postcranial of Passerines. For other groups there are something, but never a single good book for many groups. If you are interested in more info, write me at [email protected]
Thank you very much, also I obtained info about prepared guide to identification of bird bones (passeriformes) from slovak expert on the owl diet. I downloaded some books in pdf from the links published here. Thank you for interest.