| Assist. Prof. Boyan Todorov | MPI, Mainz, Germany | 01.11.2016-15.11.2016 |
| Assist. Prof. Miroslava Nedyalkova | University of Barcelona | 15.11.2016-05.12.2016 |
| Assoc. Prof. Aleksey Vassilev | MPI, Mainz, Germany | 05.01.2017-05.02.2017 |
| Assoc. Prof. Hristyan Alexandrov | University of Barcelona | 18.01.2017-15.02.2017 |
| Assist. Prof. Miroslava Nedyalkova | University of Barcelona | 07.02.2017-21.03.2017 |
| Assoc. Prof. Aleksey Vassilev | MPI, Mainz, Germany | 14.06.2017-30.06.2017 |
| Assoc. Prof. Hristyan Alexandrov | University of Barcelona | 13.07.2017-12.08.2017 |
| Assist. Prof. Miroslava Nedyalkova | University of Barcelona | 15.07.2017-03.08.2017 |
| Dr. Ivan Lesov | University of Cambride | 24.07.2017-04.08.2017 |
| Dr. Julieta Valkova | University of Cambride | 06.08.2017-18.08.2017 |
| Assist. Prof. Veselin Petrov | University of Barcelona | 04.09.2017-17.09.2017 |
| Assoc. Prof. Yulian Zagraniarski | MPI, Mainz, Germany | 01.10.2017-29.10.2017 |
| Prof. Todor Dudev | University of Barcelona | 14.10.2017-21.10.2017 |
| Assoc. Prof. Galia Madjarova | University of Barcelona | 16.04.2018-29.04.2018 |
| Assoc. Prof. Hristiyan Aleksandrov | University of Barcelona | 12.07.2018-11.08.2018 |
| Assist. Prof. Jasmina Petrova | University of Barcelona | 15.07.2018-28.07.2018 |
| Assist. Prof. Nevena Petkova | MPI, Mainz, Germany | 03.09.2018-30.09.2018 |
| Assist. Prof. Nikola Burdjiev | MPI, Mainz, Germany | 03.09.2018-30.09.2018 |
| Prof. Vassil Simeonov | University of Barcelona | 28.10.2018-07.11.2018 |
| Dr. Lyuben Mihaylov | University of Cambride | 14.01.2019-27.01.2019 |
| Assoc. Prof. Hristiyan Aleksandrov | University of Barcelona | 17.01.2019-16.02.2019 |
| Assoc. Prof. Anife Ahmedova | University of Barcelona | 02.02.2019-02.03.2019 |
| Assoc. Prof. Galia Madjarova | University of Cambride | 24.02.2019-10.03.2019 |
| Assoc. Prof. Stanimir Stoyanov | University of Barcelona | 07.06.2019-21.06.2019 |
| Assoc. Prof. Diana Cheshmedzieva | University of Barcelona | 07.06.2019-21.06.2019 |
| Assist. Prof. Nevena Petkova | University of Barcelona | 09.06.2019-28.06.2019 |
| Assist. Prof. Nikola Burdjiev | University of Barcelona | 09.06.2019-28.06.2019 |
| Assoc. Prof. Hristiyan Aleksandrov | University of Barcelona | 12.06.2019-06.07.2019 |
| Iskra Zareva Koleva | University of Barcelona | 12.06.2019-06.07.2019 |
| Assist. Prof. Miroslava Nedyalkova | University of Barcelona | 25.06.2019-05.08.2019 |
| Assoc. Prof. Hristiyan Aleksandrov | University of Barcelona | 11.07.2019-10.08.2019 |
| Dr. Boyan Rumenov Tododrov | University of Barcelona | 11.07.2019-24.07.2019 |
| Assoc. Prof. Meglena Kandinska Vasileva | MPI, Mainz, Germany | 15.07.2019-27.08.019 |
