@article{LeOh2010,
	author = {M. Leok and T. Ohsawa},
	title = {Discrete {D}irac Structures and Implicit Discrete {L}agrangian and {H}amiltonian Systems},
	publisher = {AIP},
	year = {2010},
	journal = {AIP Conference Proceedings},
	volume = {1260},
	number = {1},
	pages = {91-102},
	doi={10.1063/1.3479325},
}