@misc{Kelemenová_Jana_Recent_2011, author={Kelemenová, Jana}, copyright={Creative Commons Attribution BY 4.0 license}, journal={Książka = Book}, address={Warszawa}, howpublished={online}, year={2011}, publisher={Instytut Badań Systemowych. Polska Akademia Nauk}, publisher={Systems Research Institute. Polish Academy of Sciences}, language={eng}, abstract={This paper contains a generalization of a Grzegorzewski theorem [1]. He has proved the inclusion- exclusion principle for a special case of IF-events. We prove it for mappings with values in semigroups.}, type={Text}, title={Recent advances in fuzzy sets, intuitionistic fuzzy sets, generalized nets and related topics. Volume I: foundations * The inclusion-exclusion principie in semigroups}, URL={http://rcin.org.pl/ibsys/Content/206767/PDF/KS-2011-09-T1P8.pdf}, }