Raudvassar, Mika
Rebas, Hain
Rettig, Thomas
Rodrigues, Daniel Marcelino, University of Coimbra (Portugal)
Rogers, Clifford J., The United States Military Academy (West Point) (United States)
Rogers, Clifford J. (United States)
Rosenthal, Reigo
Ruben, Aarne
Rukkas, Andrii, Taras Shevchenko National University of Kyiv (Ukraine)

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