@book{35054,
	author = {Roman, Steven. and SpringerLink (Online service)},
	title = {Lattices and Ordered Sets},
	publisher = {Springer New York,},
	year = {2008.},
	address = {New York, NY :},
	url = {http://dx.doi.org/10.1007/978-0-387-78901-9}
}