VETIER, András. THE COVARIANCE FIJNCTION OF A STOCHASTIC PROCESS Periodica Polytechnica Electrical Engineering, [S. l.], v. 22, n. 2-3, p. 85–89, 1978. Disponível em: https://pp.bme.hu/ee/article/view/4856. Acesso em: 27 dec. 2024.