@incollection{Ossia20,
author = {Akuro Big-Alabo and Chinwuba Victor Ossia},
title = {Periodic Solution of Nonlinear Conservative Systems},
booktitle = {Progress in Relativity},
publisher = {IntechOpen},
address = {Rijeka},
year = {2020},
editor = {Calin Gheorghe Buzea and Maricel Agop and Leo Butler},
chapter = {14},
doi = {10.5772/intechopen.90282},
url = {https://doi.org/10.5772/intechopen.90282}
}