Ullah, M. W. ., Uddin, M. A. ., & Rahman, M. S. . (2022). ANALYTICAL SOLUTION OF MODIFIED FORCED VAN DER POL VIBRATION EQUATION USING MODIFIED HARMONIC BALANCE METHOD. Khulna University Studies, 892–903. https://doi.org/10.53808/KUS.2022.ICSTEM4IR.0180-se