Tài liệu tham khảo

WikiPedia: Barnett_Newman http://cantic.bnc.cat/registres/CUCId/a10130299 http://books.google.ch/books?id=NSMagZEohhwC&lpg=P... http://books.google.ch/books?id=fJu2-D2nhRwC&pg=PA... http://www.aaa.si.edu/collections/american-museum-... http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?... http://uli.nli.org.il/F/?func=direct&doc_number=00... http://data.bibliotheken.nl/id/thes/p069360308 http://www.barnettnewman.org/ http://www.philamuseum.org/micro_sites/exhibitions... http://www.worldcat.org/title/barnett-newman-a-cat...