FRØKJÆR-JENSEN, B.; RISCHEL, J. Fourier Analysis of Photo-Electric Glottograms. Annual Report of the Institute of Phonetics University of Copenhagen, [S. l.], v. 3, p. 128–134, 1969. DOI: 10.7146/aripuc.v3i.130759. Disponível em: https://tidsskrift.dk/ARIPUC/article/view/130759. Acesso em: 6 may. 2024.