Cattaneo, Maria Caterina, et al. “The Behavior over Time of Postnatal Depression Symptomatology and Its Early Detection via the Edinburgh Postnatal Depression Scale: An Italian Longitudinal Study”. International Journal of Advanced Nursing Studies, vol. 4, no. 1, Feb. 2015, pp. 23-29, https://doi.org/10.14419/ijans.v4i1.3931.