raffi, Shaik Mahmad, and Ch. Tirumala Rao. “Linear Free Vibration Analysis of Tapered Rectangular Cantilevered Timoshenko Beams Using Energy Field Meth-Od”. International Journal of Engineering & Technology, vol. 7, no. 4.24, Nov. 2018, pp. 119-23, https://doi.org/10.14419/ijet.v7i4.24.21870.