@inbook{cintulanoguera2011,
	title     = {A general framework for Mathematical Fuzzy Logic},
	author    = {Petr Cintula and Carles Noguera},
	year      = {2011},
	editor    = {P. Cintula, P. Hájek, C. Noguera (eds)},
	publisher = {College Publications},
	booktitle = {Handbook of Mathematical Fuzzy Logic},
	chapter   = {2},
	state     = {inpress},
	acknowledged= {1}
}