P. Ponce De León and J. Valverde, “ P System antigenic determiners expression in Ascaris lumbricoides ”, Rev. Inst. Med. Trop. São Paulo, vol. 45, no. 1, pp. 53–54, Jan. 2003, Accessed: May 23, 2024. [Online]. Available: https://www.revistas.usp.br/rimtsp/article/view/30672