Pavel Zahradnik Miroslav Vlcek Analytical Design of Arbitrary Oriented Asteroidal 2-D FIR Filters. 64-71 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3039&spage=64 2004 conf/iccS/2004-4 International Conference on Computational Science db/conf/iccS/iccS2004-4.html#ZahradnikV04a