@article{Casares2017, author = "Ramón Casares", title = "{Syntax Evolution: Problems and Recursion}", year = "2017", month = "5", url = "https://figshare.com/articles/journal_contribution/Syntax_Evolution_Problems_and_Recursion/4956359", doi = "10.6084/m9.figshare.4956359.v1" }