{"references": ["Anzidei et al, (2008). La rete geodetica GPS dell'Appennino centrale CA-GeoNet. Quaderni di Geofisica, 54; http://istituto.ingv.it/l-ingv/produzione-scientifica/quaderni-di-geofisica/numeri-pubblicati-2008.", "Avallone, A. et al. (2010), The RING network: improvements to a GPS velocity field in the central Mediterranean, Annals of Geophysics, 53(2), 39\u201354, doi:10.4401/ag-4549.", "D'Agostino, N. (2014), Complete seismic release of tectonic strain and earthquake recurrence in the Apennines (Italy), Geophys. Res. Lett., doi:10.1002/(ISSN)1944-8007.", "Devoti, R. (2012). Combination of coseismic displacement fields: a geodetic perspective, Annals of Geophysics, 55 (4); doi:10.4401/ag-6119.", "Galvani, A., M. Anzidei, R. Devoti, A. Esposito, G. Pietrantonio, A. R. Pisani, F. Riguzzi, and E. Serpelloni (2013), The interseismic velocity field of the central Apennines from a dense GPS network, Annals of Geophysics, 55(5), doi:10.4401/ag-5634.", "Serpelloni, E. et al. (2012), GPS observations of coseismic deformation following the May 20 and 29, 2012, Emilia seismic events (northern Italy): data, analysis and preliminary models, Annals of Geophysics, 55(4), doi:10.4401/ag-6168."]}

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