| article html file updated | 9 February 2020 05:12 CET | Update | https://www.mdpi.com/2227-7390/6/2/20 |
| article html file updated | 30 September 2019 10:40 CEST | Update | - |
| article html file updated | 1 May 2019 21:41 CEST | Update | - |
| article html file updated | 17 April 2019 20:31 CEST | Update | - |
| article html file updated | 28 March 2019 20:14 CET | Update | - |
| article html file updated | 14 March 2018 10:05 CET | Update | - |
| article html file updated | 6 February 2018 06:57 CET | Original file | - |
| article xml uploaded. | 6 February 2018 06:55 CET | Update | https://www.mdpi.com/2227-7390/6/2/20/xml |
| article xml uploaded. | 6 February 2018 06:55 CET | Original file | - |
| article pdf uploaded. | 6 February 2018 06:55 CET | Updated version of record | https://www.mdpi.com/2227-7390/6/2/20/pdf |
| article pdf uploaded. | 1 February 2018 15:52 CET | Version of Record | https://www.mdpi.com/2227-7390/6/2/20/pdf-vor |
