BOGDAN , A. . ILL-POSED PROBLEMS AND EXAMPLES OF INCORRECT PROBLEMS. Евразийский журнал математической теории и компьютерных наук, [S. l.], v. 4, n. 6, p. 28–37, 2024. Disponível em: https://www.in-academy.uz/index.php/EJMTCS/article/view/33789. Acesso em: 4 фев. 2026.