Vibration analysis of bidirectional functionally graded (BDFG) nanobeams partially resting on elastic foundationAnh Ngoc Thi Le, Toan Trong Tran and Tuan Ngoc Tran CaoE3S Web Conf., 626 (2025) 03002DOI: https://doi.org/10.1051/e3sconf/202562603002