Graeff-Teixeira, Carlos, et al. “ Clinical and Epidemiological Aspects of Abdominal Angiostrongyliasis in Southern Brazil ”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 33, no. 5, Oct. 1991, pp. 373-8, https://www.revistas.usp.br/rimtsp/article/view/28856.