| article html file updated | 7 February 2020 20:53 CET | Update | https://www.mdpi.com/2227-7390/5/1/2 |
| article html file updated | 22 September 2019 18:23 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:35 CEST | Update | N/A |
| article html file updated | 30 March 2017 08:54 CEST | Update | N/A |
| article html file updated | 6 January 2017 09:46 CET | Original file | N/A |
| article xml uploaded. | 6 January 2017 09:45 CET | Original file | https://www.mdpi.com/2227-7390/5/1/2/xml |
| article pdf uploaded. | 6 January 2017 09:45 CET | Version of Record | https://www.mdpi.com/2227-7390/5/1/2/pdf |
