@article{ivanova_2022,  title={Study of Mechanical Stresses in Thin-Walled Pressure Vessels Using Ultrasonic Methods},  volume={25},  ISSN={1516-1439},  url={https://doi.org/10.1590/1980-5373-MR-2021-0495},  DOI={10.1590/1980-5373-MR-2021-0495},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Ivanova, Yonka},  year={2022},  pages={e20210495} }