[1]
Rahman, M.S. 2012. A perturbation technique to compute initial amplitude and phase for the Krylov-Bogoliubov-Mitropolskii method. Tamkang Journal of Mathematics. 43, 4 (Dec. 2012), 563–575. DOI:https://doi.org/10.5556/j.tkjm.43.2012.853.