@incollection{Liu17,
author = {Yang Liu},
title = {Lagrangian Subspaces of Manifolds},
booktitle = {Lagrangian Mechanics},
publisher = {IntechOpen},
address = {Rijeka},
year = {2017},
editor = {Hüseyin Canbolat},
chapter = {2},
doi = {10.5772/67290},
url = {https://doi.org/10.5772/67290}
}