@misc{Robbel_Gerd_Many-valued_1980,
 author={Robbel, Gerd},
 volume={28},
 number={11-12},
 editor={Polska Akademia Nauk.},
 editor={Państwowe Wydawnictwo Naukowe (1951–1992)},
 copyright={Rights Reserved - Restricted Access},
 address={Varsovie},
 howpublished={online},
 year={1980},
 publisher={Państwowe Wydawnictwo Naukowe},
 language={eng},
 type={Text},
 title={Many-valued logics based on L-algebras or on P-algebras},
}