Berne, Ana Cristina, et al. “Giardia Lamblia: Diagnosis Using Microscopic Methods and Enzyme-Linked Immunosorbent Assay (ELISA)”. Revista de Patologia Tropical Journal of Tropical Pathology, vol. 43, no. 4, Jan. 2015, pp. 412-9, https://doi.org/10.5216/rpt.v43i4.33602.