Short-time (up to one month) visits
- School of Business and Economics (Humboldt-Universität zu Berlin, Germany)
- Invited by Prof. Wolfgang Härdle, research, lectures (2003, 2004, 2007)
School of Computational and Applied Mathematics (University of the Witwatersrand, South Africa)
- Invited by Prof. David Taylor, research (2003, 2004, 2005)
- Physics Department (Bar-Ilan University, Israel)
- Invited by Prof. Yuval Garini, research (2010, 2014)
- Faculty of Commerce (Cape Town University, South Africa)
- Invited by Prof. David Taylor, research (2013, 2018)
- ICFO - The Institute of Photonic Sciences (Barcelona)
- Invited by Prof. Carlo Manzo, research, lectures (2016)
- Institute for Physics and Astronomy (University of Potsdam, Germany)
- Invited by Prof. Ralf Metzler, research, lectures (2012, 2014, 2021)
- Electrical and Computer Engineering and School of Biomedical Engineering (Colorado State University, USA)
- Invited by Prof. Diego Krapf, research, lectures (2017, 2023)
