Raitis Ozols Rusins Freivalds Jevgenijs Ivanovs Elina Kalnina Lelde Lace Masahiro Miyakawa Hisayuki Tatsumi Daina Taimina Boolean Functions with a Low Polynomial Degree and Quantum Query Algorithms. 408-412 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3381&spage=408 2005 conf/sofsem/2005 SOFSEM db/conf/sofsem/sofsem2005.html#OzolsFIKLMTT05