SUN SHIWEN. Seeking the meaning of planning and corresponding countermeasures in real situations. Acta Scientiae, [S. l.], v. 23, n. 4, p. 1–11, 2022. Disponível em: https://www.periodicos.ulbra.org/index.php/acta/article/view/28. Acesso em: 20 sep. 2026.