Lech Polkowski Rough-fuzzy-neurocomputing based on rough mereological calculus of granules. 91-108 2005 2 Int. J. Hybrid Intell. Syst. 2 http://iospress.metapress.com/openurl.asp?genre=article&issn=1448-5869&volume=2&issue=2&spage=91 db/journals/ijhis/ijhis2.html#Polkowski05