| article html file updated | 8 February 2020 00:55 CET | Update | https://www.mdpi.com/2227-7102/7/1/39 |
| article html file updated | 23 September 2019 16:44 CEST | Update | - |
| article html file updated | 4 May 2019 07:54 CEST | Update | - |
| article html file updated | 27 October 2017 09:57 CEST | Update | - |
| article html file updated | 7 March 2017 11:50 CET | Update | - |
| article html file updated | 7 March 2017 11:50 CET | Update | - |
| article html file updated | 7 March 2017 11:50 CET | Original file | - |
| article xml uploaded. | 7 March 2017 11:48 CET | Update | https://www.mdpi.com/2227-7102/7/1/39/xml |
| article pdf uploaded. | 7 March 2017 11:48 CET | Version of Record | https://www.mdpi.com/2227-7102/7/1/39/pdf |
