Franz R. Pichler,
"Walsh-Functions: Early ideas on their application in Signal Processing and Communication Engineering"
, in Wydawnictwa Komunikacji i Lacznosci sp. z o.o: Diversitas Cybernetica, Warszawa, Seite(n) 153-165, 2005, ISBN: 83-206-1595-X
Original Titel:
Walsh-Functions: Early ideas on their application in Signal Processing and Communication Engineering