Tinelli, Elena, et al. “Analysis of Obstetric Care Variables Associated With Caesarean Section in Low-Risk Pregnancy Patients”. Acta Biomedica Atenei Parmensis, vol. 86, no. 3Supp, Jan. 2016, pp. 189-93, https://mattioli1885journals.com/index.php/actabiomedica/article/view/5160.