Effective tools for non-material motivation of employeesSnezhana A. Nadezhkina, Vadim A. Nadezhkin, Alexander L. Zolkin, Svetlana N. Sychanina and Avgustina B. UrusovaE3S Web Conf., 449 (2023) 05003DOI: https://doi.org/10.1051/e3sconf/202344905003