Ukraine in the crosshairs of geopolitical power play - Mez, Lutz 1944-; Lefebvre, Maxime 1967-; Sakwa, Richard 1953-; Kortunov, Andrej Vadimovič 1957-; Gärtner, Heinz 1951-; Janik, Maya; Pindyuk, Olga 1978- (Campus, 2020)