Lauritzen, K. and Frøkjær-Jensen, B. 1970. Comparative Phonetic-Acoustic Analysis Before and After Speech Therapy of Voices Suffering from Recurrens Paresis. Annual Report of the Institute of Phonetics University of Copenhagen. 4, (Mar. 1970), 145–165. DOI:https://doi.org/10.7146/aripuc.v4i.130784.