Sulyak S. G. «The Rusin identity (A Case Study of Galicians' Participation in the Civil War)» // Rusin Studies. An Abstracts Journal 2018. №1 C.67-73
Ivanov Andrei A., Chemakin Anton A. «Today We Have No Czarist Russia - All We Have is Soviet Russia": the Views of the Galician-Russian Socialist K.M. Valnitskiy on Revolution, Civil War and Armed Intervention» // Rusin 2017. №3 (49) C.101-121
Sulyak Sergey G. «The Rusin identity (a case study of Galicians' participation in the Civil War)» // Rusin 2015. №4 (42) C.107-125