the most recent scholarly materials that i know of are primarily volodymyr serhiychuk's books from kyiv i recently got a copy of published by the kyiv state university in he has another interesting book about the deportation of poles from ukraine which was published in which i used for an article not long ago about polish deportations i'm gradually working my way through the book another interesting book is mykola siwicki's book published in lviv in which is also very interesting