References
Witold Kosiński
Fuzziness – representation of dynamic changes by ordered fuzzy numbers
2009
with Prokopowicz Piotr, Kacprzak Darek
in: Views on fuzzy sets and systems from different perspectives, Dordrecht : Springer
Meta sets – another approach to fuzziness
2009
with Starosta Bartłomiej
in: Views on fuzzy sets and systems from different perspectives, Dordrecht : Springer