Інститут політичних і етнонаціональних
досліджень ім. І. Ф. Кураса
НАН України
https://ipiend.gov.ua/en/publication/vynnychenko-and-petliura-political-portraits-of-the-revolution-time/
Vynnychenko and Petliura: political portraits of the revolution time Vynnychenko and Petliura: political portraits of the revolution time
A new monography of professor Valery F. Soldatenko "Vynnychenko and Petliura: political portraits of the revolution time: was published.
You can view the contents (in original language) here