SAHAGAL, S. Presentation through Graphs or Thinking in Pictures. Journal of Commerce and Trade , "Meerut, India", v. 6, n. 2, p. 117–121, 2011. DOI: 10.26703/jct.v6i2.344. Disponível em: https://jctindia.org/index.php/jct/article/view/o11-ss. Acesso em: 16 jul. 2024.