HALPER, Christian - IĽKO, Ján - RUSKO, Miroslav. Application of ultrasonic method for measuring the sound velocity in a medium to determine the temperature change and fluctuations. In Annals of DAAAM 2018 [elektronický zdroj] : Volume 29, No. 1. The 29th DAAAM International Symposium on Intelligent Manufacturing and Automation. Zadar, Croatia, 21. - 28. 10. 2018. 1. vyd. Vienna : DAAAM International, 2018, S. 0687-0697. ISSN 2304-1382. ISBN 978-3-902734-21-1.