Times of upheaval : four medievalists in twentieth-century Centra Europe : conversations with Jerzy Kłoczowski, János M. Bak, František Šmahel and Herwig Wolfram / edited by Pavlína Rychterová, Gábor Klaniczay, Paweł Kras, Walter Pohl.    Budapest ; New York : CEU Press, Central European University Press, 2019 . 390 stran