Fornasari, D., et al. “A “novel” Association to Treat Pain: Tramadol Dexketoprofen. The First Drug of a ‘new Pharmacological class’”. Acta Biomedica Atenei Parmensis, vol. 88, no. 1, Apr. 2017, pp. 17-24, https://doi.org/10.23750/abm.v88i1.6361.