Alzbeta Michalíková Outer Measure on MV-algebras. 237-240 2007 EUSFLAT Conf. (1) http://www.eusflat.org/proceedings/EUSFLAT_2007/papers/Michalikova__Alzbeta_(49).pdf conf/eusflat/2007-1 db/conf/eusflat/eusflat2007-1.html#Michalikova07