PERIODICA POLYTECHNICA: ELECTRICAL ENGINEERING - Volume I - XVIII (1957 -1974) CONTENTS - SUBJECT INDEX - AUTHOR INDEX. Periodica Polytechnica Electrical Engineering, [S. l.], v. 19, n. 4, p. 1–37, 1975. Disponível em: https://pp.bme.hu/ee/article/view/4960. Acesso em: 19 may. 2024.