Novel kinematic methods to trace Spiral Arms nature using Gaia dataS. Roca-Fàbrega, F. Figueras, O. Valenzuela, M. Romero-Gómez, T. Antoja, P. Colín, B. Pichardo and H. VelázquezEAS Publications Series, 67-68 (2014) 393-394DOI: https://doi.org/10.1051/eas/1567083