?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=+Altorjay+Tam%C3%A1s&rft.aufirst=Tam%C3%A1s&rft.aulast=Altorjay&rft.date=2022&rft.isbn=978-963-306-862-5&rft.title=Assessment+of+the+effects+of+four+special+warm-up+sessions+on+the+singing+voice+using+acoustical+parameters+%3A+%5Babsztrakt%5D&rft.genre=proceeding