Nahaievs'kyĭ, Isydor.
History of the modern Ukrainian State, 1917-1923 /
Isidore Nahayewsky 
. - Munich : Ukrainian Free University and Academy of Arts and Sciences,  1966 
. - 317 p.  iil.  24 cm. 
<br/>К.: Бібліогр. : c. 309-312, Index