| First Name | Last Name | Institutions | Articles |
|---|---|---|---|
| Radovan | Lapuník | Matej Bel University in Banská Bystrica | 1 |
| Radosław | Korneć | Siedlce University of Natural Sciences and Humanities | 1 |
| Radosław | Miśkiewicz | Silesian University of Technology | 2 |
| Radoslav | Jankal | University of Žilina | 6 |
| Radoslav | Ivančík | Academy of the Police Force in Bratislava; Constantine the Philosopher University in Nitra |
14 |
| Radoslav | Kostev | Technical University of Sofia | 2 |
| Radoslav | Kožiak | College of Polytechnics Jihlava | 1 |
| Radka | Marčeková | Matej Bel University in Banská Bystrica | 2 |
| Radim | Dušek | Institute of Technology and Business in České Budějovice | 4 |
| Rachmi Cahya | Amalia | Airlangga University | 1 |
| Rachmat | Sudarsono | Padjadjaran University | 1 |
| Ráchel | Hagarová | Bratislava University of Economics and Business | 1 |
| Rabab Hasan | Ebrahim | University of Bahrain | 1 |
| Qingxia | Zhang | Jiaxing Vocational Technical College | 1 |
| Puji | Handayati | State University of Malang | 1 |
| Przemysław | Macholak | University of Pennsylvania | 1 |
| Prawira Fajarindra | Belgiawan | Bandung Institute of Technology | 1 |
| Pooreum | Ryu | Kookmin University | 1 |
| Piotr | Łebkowski | AGH University of Science and Technology | 1 |
| Piotr | Majdak | University of Physical Education | 1 |