| # | Name | Institution | Programme | Duration | Year |
|---|---|---|---|---|---|
| 1 | Prof. Dr. Takayuki Mori | University of Marketing and Distribution Sciences, Japan | 10 February - 6 March 2015 (25 days) | 2014 | |
| 2 | Prof. Dr. Andreas Wittmer | University of St. Gallen, Switzerland | 5 - 13 February 2015 (9 days) | 2014 |
