Fieni, S., R. Berretta, and C. Merisio, et al. 2005. “Retzius’ Space Haematoma After Spontaneous Delivery: A Case Report”. Acta Biomedica Atenei Parmensis 76 (3): 175-77. https://mattioli1885journals.com/index.php/actabiomedica/article/view/2042.