Kovalchuk, O. & Kriwet, J. & Shimada, K. & Ryabokon, T. & Barkaszi, Z. & Dubikovska, A. & Anfimova, G. & Davydenko, S. (2023)
Middle Eocene cartilaginous fishes (Vertebrata: Chondrichthyes) of the Dnieper–Donets Basin, northern Ukraine. Palaeontologia Electronica, 26(2), Article a32

Amadori, M. & Kovalchuk, O. & Barkaszi, Z. & Giusberti, L. & Kindlimann, R. & Kriwet, J. (2023)
A diverse assemblage of Ptychodus species (Elasmobranchii: Ptychodontidae) from the Upper Cretaceous of Ukraine, with comments on possible diversification drivers during the Cenomanian, Cretaceous Research, 151, Article 105659
DOI: 10.1016/j.cretres.2023.105659

Kovalchuk, O. & Barkaszi, Z. (2021)
Oligocene basking sharks (Lamniformes, Cetorhinidae) of the Carpathian Basin with a reconsideration of the role of gill rakers in species diagnostics. Journal of Vertebrate Paleontology, 41(2), Article e1929269
DOI: 10.1080/02724634.2021.1929269

Barkaszi, Z. & Kovalchuk, O. (2021)
New records of Oligocene selachians (Elasmobranchii) from the Outer Carpathian Basin. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen, 301(2), 171–182
DOI: 10.1127/njgpa/2021/1006