| article html file updated | 7 February 2020 22:11 CET | Update | https://www.mdpi.com/2227-7382/5/1/4 |
| article html file updated | 23 September 2019 01:18 CEST | Update | - |
| article html file updated | 4 May 2019 13:41 CEST | Update | - |
| article html file updated | 30 March 2017 12:01 CEST | Update | - |
| article html file updated | 25 January 2017 08:35 CET | Original file | - |
| article xml uploaded. | 25 January 2017 08:34 CET | Update | https://www.mdpi.com/2227-7382/5/1/4/xml |
| article xml uploaded. | 25 January 2017 08:34 CET | Original file | - |
| article pdf uploaded. | 25 January 2017 08:34 CET | Version of Record | https://www.mdpi.com/2227-7382/5/1/4/pdf |
