Lima-de -Faria. 1980. Classification of genes, rearrangements and chromosomes according to the chromosome field. Hereditas 93: 1-46.                   onlinelibrary.wiley.com/store/10.1111/j.1601-5223.1980.tb01043.x/asset/j.1601-5223.1980.tb01043.x.pdf?v=1&t=ics9k8p2&s=b92a8726a47c83c91e0a103cafaac5149247eaa6