@conference {katsikis2008methods,
	title = {Methods on Computing Positive Bases in Finite-Dimensional Vector Sublattices. Applications in Completion of Security Markets and in the Theory of Efficient Funds.},
	booktitle = {AIP Conference Proceedings},
	volume = {1048},
	number = {1},
	year = {2008},
	pages = {302{\textendash}306},
	publisher = {American Institute of Physics},
	organization = {American Institute of Physics},
	author = {Vasilios N. Katsikis}
}
