Das, Prakash Kumar, Debabrata Singh, and Madan Mohan Panja. 2019. “Some Modifications on RCAM for Getting Accurate Closed-Form Approximate Solutions of Duffing- and Lienard-Type Equations”. JOURNAL OF ADVANCES IN MATHEMATICS 16 (January):8213-25. https://doi.org/10.24297/jam.v16i0.8017.