| article html file updated | 7 February 2020 05:35 CET | Update | https://www.mdpi.com/2227-7390/4/1/15 |
| article html file updated | 21 September 2019 12:42 CEST | Update | - |
| article html file updated | 5 May 2019 22:07 CEST | Update | - |
| article html file updated | 26 March 2019 22:52 CET | Update | - |
| article html file updated | 29 March 2016 07:21 CEST | Original file | - |
| article pdf uploaded. | 8 March 2016 11:02 CET | Version of Record | https://www.mdpi.com/2227-7390/4/1/15/pdf |
| article xml uploaded. | 8 March 2016 11:02 CET | Original file | https://www.mdpi.com/2227-7390/4/1/15/xml |
