| First Name | Last Name | Institutions | Articles |
|---|---|---|---|
| Oksana | Levkovich | Dnipro State Agrarian and Economic University | 1 |
| Olga Vadimirovna | Protopopova | Peoples’ Friendship University of Russia | 1 |
| Oleg Mikhailovich | Tolmachev | Bauman Moscow State Technical University | 1 |
| Oleksandr | Laiko | Institute of Market Problems and Economic-Ecological Research NAS of Ukraine | 1 |
| Oxana | Posukhova | Southern Federal University | 1 |
| Olena | Dovgal | Mykolayiv State Agrarian University; University of Customs and Finance |
1 |
| Oguz | Turkay | Sakarya University of Applied Sciences | 1 |
| Olga | Soboleva | Pan-European University | 1 |
| Oksana Viktorovna | Shumakova | Omsk State Agrarian University after P.A. Stolypin | 1 |
| Olha | Us | Yaroslav Mudryi National Law University | 1 |
| Oleksandra | Stoian | Petro Mohyla Black Sea State University | 1 |
| Olena | Verenych | Kyiv National University of Construction and Architecture | 1 |
| Olga | Vandina | Armavir State Pedagogical University | 1 |
| Olga V. | Savinova | I.M. Sechenov First Moscow State Medical University | 1 |
| Omar Jaber | Aburumman | University Malaysia Terengganu | 1 |
| Olga | Gogulya | National University of Life and Environmental Sciences of Ukraine | 2 |
| Olha | Brovko | Simon Kuznets Kharkiv National University of Economics | 2 |
| Osama | Wagdi | Modern University for Technology and Information; International Academy For Engineering & Media Science |
2 |
| Olga | Cherednichenko | Bratislava University of Economics and Management | 2 |
| Oleg V. | Zakharchenko | Odessa State Academy of Civil Engineering and Architecture | 2 |