@article {912,
	title = {Preface to the Special Issue},
	journal = {DISCRETE APPLIED MATHEMATICS},
	volume = {157},
	year = {2009},
	note = {UT: 000262243800001ScopusID: 56649097446doi: 10.1016/j.dam.2008.08.005},
	month = {2009///},
	pages = {437},
	isbn = {0166-218X},
	author = {L{\'a}szl{\'o} G{\'a}bor Ny{\'u}l and K{\'a}lm{\'a}n Pal{\'a}gyi}
}
