| article html file updated | 9 February 2020 06:06 CET | Update | https://www.mdpi.com/2227-7390/6/2/22 |
| article html file updated | 30 September 2019 16:09 CEST | Update | - |
| article html file updated | 1 May 2019 19:39 CEST | Update | - |
| article html file updated | 17 April 2019 18:47 CEST | Update | - |
| article html file updated | 28 March 2019 22:11 CET | Update | - |
| article html file updated | 14 March 2018 10:05 CET | Update | - |
| article html file updated | 12 February 2018 02:47 CET | Update | - |
| article xml uploaded. | 12 February 2018 02:46 CET | Update | https://www.mdpi.com/2227-7390/6/2/22/xml |
| article pdf uploaded. | 12 February 2018 02:46 CET | Updated version of record | https://www.mdpi.com/2227-7390/6/2/22/pdf |
| article html file updated | 11 February 2018 11:23 CET | Update | - |
| article xml uploaded. | 11 February 2018 11:22 CET | Update | - |
| article pdf uploaded. | 11 February 2018 11:22 CET | Updated version of record | https://www.mdpi.com/2227-7390/6/2/22/pdf-vor |
| article html file updated | 9 February 2018 17:42 CET | Original file | - |
| article xml uploaded. | 9 February 2018 17:41 CET | Original file | - |
| article pdf uploaded. | 9 February 2018 17:41 CET | Version of Record | https://www.mdpi.com/2227-7390/6/2/22/pdf-vor |