Mya Thet Hnin และ Thein Min Htike. (2021) Investigation of natural frequency and critical speed for Jeffcott rotor system. <i>Journal of Research and Applications in Mechanical Engineering (JRAME)</i>, <i>9</i>(1), JRAME-21-9-001 (p.1-6).Mya Thet Hnin และ Thein Min Htike. "Investigation of natural frequency and critical speed for Jeffcott rotor system". Journal of Research and Applications in Mechanical Engineering (JRAME) 9 (2021):JRAME-21-9-001 (p.1-6).Mya Thet Hnin และ Thein Min Htike. Investigation of natural frequency and critical speed for Jeffcott rotor system. Thai Society of Mechanical Engineers (TSME):ม.ป.ท. 2021.