"What is a city but [what it offers to] the people?": spatial interaction gravity models on internal migration within Tuscany.

Francesco Viviani Leonardo Piccini Chiara Bocci "What is a city but [what it offers to] the people?": spatial interaction gravity models on internal migration within Tuscany. 2026 January 105-121 28 J. Geogr. Syst. 1 https://doi.org/10.1007/s10109-026-00492-9 db/journals/jgs/jgs28.html#VivianiPB26 streams/journals/jgs