| article html file updated | 9 February 2020 03:51 CET | Update | https://www.mdpi.com/2227-7102/8/1/18 |
| article html file updated | 30 September 2019 02:45 CEST | Update | - |
| article html file updated | 2 May 2019 00:35 CEST | Update | - |
| article html file updated | 17 April 2019 23:00 CEST | Update | - |
| article html file updated | 28 March 2019 17:20 CET | Update | - |
| article html file updated | 27 March 2018 15:18 CEST | Update | - |
| article html file updated | 23 January 2018 13:28 CET | Original file | - |
| article xml uploaded. | 23 January 2018 13:27 CET | Update | https://www.mdpi.com/2227-7102/8/1/18/xml |
| article xml uploaded. | 22 January 2018 17:22 CET | Original file | - |
| article pdf uploaded. | 22 January 2018 17:22 CET | Version of Record | https://www.mdpi.com/2227-7102/8/1/18/pdf |
