Boreyri, S., Mohtat, P., Ketabdari, M. J., & Moosavi, A. (2014). Vibration analysis of a tapered beam with exponentially varying thickness resting on Winkler foundation using the differential transform method. International Journal of Physical Research, 2(1), 10-15. https://doi.org/10.14419/ijpr.v2i1.2152