@misc{torsional+mode+shapes+of+fgm+shafts+with+various+cross+section,
    author = {Kumor, Mateusz},
    title = {Torsional mode shapes of FGM shafts with various cross section},
    journal = {Technical Transactions},
    address = {Warsaw},
    publisher = {Sciendo},
    date = {2025},
    number = {Vol. 122, iss. 1}
}