@PRESENTATION{hajek2011,
	title     = {Computational complexity, arithmetical hierarchy and mathematical fuzzy logic},
	author    = {Petr Hajek},
	year      = {2011},
	month     = {June},
	booktitle = {Church's Thesis: Logic, Mind and Nature. Trends in Logic IX, Krakow (Poland), June 3-5, 2011},
	note      = {invited talk, },
	state     = {published}
}