| 2020 | 11.09.2020 – 10.01.2020 National Institute for Laser, Plasma and Radiation Physics, Magurele, Rumunia |
| 2017 | 13–26.11.2017 Institute of Biomaterials, Department of Materials Science and Engineering, Friedrich Alexander-University Erlangen-Nuremberg, Niemcy |
| 2015 | 28.06 – 12.07.2015 Institute of Biomaterials, Department of Materials Science and Engineering, Friedrich Alexander-University Erlangen-Nuremberg, Niemcy |
| 2013 | 04 – 12.2013 Philips Research, Eindhoven, Holandia |