of the Y Chromosome ". Nature 226 (5249): 897. June 6, 1970. doi : 10.1038/226897a0 . http://www.nature.com/nature/journal/v226/n5249/index.html#NV . ^ " Dyeing the Y Chromosome ". Lancet 297 (7693): 275–6. February 6, 1971. doi : 10.1016/S0140-6736(71)91008-7 . http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T1B-49HF3RM-35B&_user=10&_coverDate=02%2F06%2F1971&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=1796c6b7fa2bda832949d9da347fd53e . ^ Zech L (December 1969). " Investigation of Metaphase Chromosomes with DNA-binding Flurochromes