MA, Z. The Discrimination of Several Groups of Function Words. Journal of Sinology (วารสารจีนวิทยา), [S. l.], v. 3, p. 41–61, 2009. Disponível em: https://so16.tci-thaijo.org/index.php/JSINO/article/view/2740. Acesso em: 3 dec. 2025.