* {{Cite book |ref= harv|last=Bezerra| first = Carlos André Dias| authorlink = | coauthors = Douglas Eduardo Zampieri| editor = Marco Ceccarelli| others = | title = International Symposium on History of Machines and Mechanisms: Proceedings HMM2004|url=http://books.google.com/books?id=FqZvlMnjqY0C&printsec=frontcover#v=onepage&q&f=false| format = | accessdate = 7. септембар 2010| accessyear = | accessmonth = | edition = | date = |year=2004| month = | publisher = Kulwer Academic Publishers| location = Dordrecht| language = {{ен}}| id = ISBN 1-4020-2203-4 (HB); ISBN 1-4020-2204-2 (e-book)| doi =|pages=371–389| chapter = Biped robots: The state of art| chapterurl = http://books.google.com/books?id=FqZvlMnjqY0C&lpg=PP1&pg=PA371#v=onepage&q&f=false}}
* {{Cite book |ref= harv|last=Hunt| first = V. Daniel| title = Industrial Robotics Handbook|url=http://books.google.com/books?id=fHZTIZ8K-lUC&printsec=frontcover#v=onepage&q&f=false| accessdate = 10. септембар 2010| edition = Fourth Printing|year=1983| publisher = Industrial Press| location = New York| language = {{ен}}| id = ISBN 0-8311-1148-8|pages=326| chapter = Yugoslavia| chapterurl = http://books.google.com/books?id=fHZTIZ8K-lUC&lpg=PA326&pg=PA326#v=onepage&q&f=false}}
