KLÁR, J. THE USE OF THE CATEGORIES AND DYNAMIC ELEMENTS OF RESEARCH REQlJIREMENTS Periodica Polytechnica Mechanical Engineering, [S. l.], v. 4, n. 2, p. 179–192, 1960. Disponível em: https://pp.bme.hu/me/article/view/6398. Acesso em: 2 may. 2024.