| article html file updated | 9 February 2020 03:28 CET | Update | https://www.mdpi.com/2227-7080/6/1/13 |
| article html file updated | 30 September 2019 00:33 CEST | Update | - |
| article html file updated | 2 May 2019 01:25 CEST | Update | - |
| article html file updated | 17 April 2019 23:44 CEST | Update | - |
| article html file updated | 28 March 2019 16:30 CET | Update | - |
| article html file updated | 28 March 2018 04:20 CEST | Update | - |
| article html file updated | 27 March 2018 16:51 CEST | Update | - |
| article html file updated | 18 January 2018 09:04 CET | Original file | - |
| article xml uploaded. | 18 January 2018 09:03 CET | Original file | https://www.mdpi.com/2227-7080/6/1/13/xml |
| article pdf uploaded. | 18 January 2018 09:03 CET | Version of Record | https://www.mdpi.com/2227-7080/6/1/13/pdf |
