@article {2009.10719, archivePrefix = {arXiv}, eprint = {2009.10719}, primaryClass = {cond-mat.mes-hall}, author = {Tanay Nag and Vladimir Juricic and Bitan Roy}, title = {Hierarchy of higher-order Floquet topological phases in three dimensions}, year = {2020}, url = {http://arxiv.org/abs/2009.10719} }