Zhang Lukun. The Transfer Matrix Method for Computing Longitudinal and Torsinal Natural Vibration Frequencies of Wedge-Shaped Straight Bars[J]. Journal of Chongqing Jiaotong University(Natural Science), 1982, 1(3): 12-17.
张录坤. 楔形直杆的纵、扭振动固有频率的传递计算[J]. 重庆交通大学学报(自然科学版), 1982, 1(3): 12-17.