| article html file updated | 8 February 2020 07:37 CET | Update | https://www.mdpi.com/2227-7102/7/2/60 |
| article html file updated | 25 September 2019 05:02 CEST | Update | N/A |
| article html file updated | 3 May 2019 18:42 CEST | Update | N/A |
| article html file updated | 27 October 2017 09:58 CEST | Update | N/A |
| article html file updated | 6 June 2017 14:35 CEST | Original file | N/A |
| article xml uploaded. | 6 June 2017 14:34 CEST | Original file | https://www.mdpi.com/2227-7102/7/2/60/xml |
| article pdf uploaded. | 6 June 2017 14:34 CEST | Version of Record | https://www.mdpi.com/2227-7102/7/2/60/pdf |
