Thực đơn
Piet Hein (nhà khoa học) Thư mụcThực đơn
Piet Hein (nhà khoa học) Thư mụcLiên quan
Pietermaritzburg Pietro Badoglio Pietro Mascagni Piet Mondrian Pietas Pietro Parolin Pieter Bruegel il Vecchio Pietro Locatelli Pieter Zeeman Piet Hein (nhà khoa học)Tài liệu tham khảo
WikiPedia: Piet Hein (nhà khoa học) http://www.pamono.com/designers/piet-hein http://www.piethein.com/ http://www.piethein.com/usr/piethein/HomepagUK.nsf... http://mathworld.wolfram.com/Superellipse.html http://www.fam-bundgaard.dk/SOMA/HISTORY.HTM http://www.fam-bundgaard.dk/SOMA/NEWS/N001203.HTM http://www.archimedes-lab.org/grooks.html https://books.google.com/books?id=lFYEAAAAMBAJ&lpg... https://web.archive.org/web/20050305223250/http://... https://web.archive.org/web/20100804202919/http://...