External Links
Kuban Kazak is Russian biased and Beetstra does not read any Russian or Ukrainian or Cyrillic.

Maybe someone can use these for references in the article or as External Links (I am for it, but please agree as well - as there are some objections from a Dutchman who issued a warning to me, and one Russian)

 Andrij Mendeluk. Ukrainian Ethnographic Border and Peculiarities of Its Forming (by Prof. V. О. Gerynovych) (Ukrainian) - this is a Ukrainian journals source
 Dialect map of Ukrainian language (Ukrainian/English) - this page is a page of Ukrainians in Poland. It's not personal page!
 Ukrainian ethnograhpic map 1949 by V.Kubijovyc-M.Kulyckyj (Ukrainian/English) - this is purely ethnographic page
 Ethnic Territory of the Ukrainian people in the Late Nineteenth and Early Twentieth Centuries (English) - the same
 Linguistic Divisions of Europe in 1914 (German) - even though it is personal page, but it is personal page of a Professor Emeritus, who teached 40 years at Boston College and now teaches Honors course! As his surname hints, he is German and thus not pro-Ukrainian or pro-Russian I guess (this map shows German colonies).
 Etnographical map of Slavs / Národopisná mapa Slovanstva, end of 19th beginning of 20th century (Czech) Slovanstvo. Praha 1912. (Příloha.) - I changed to another source - page of a Bulgarian historian who is unlikely pro-Ukrainian !
Ethnolinguistic setting of the Ukrainian lands. Historical Atlas of Ukraine - I change to this source: it is a Sumy City page