| article html file updated | 7 February 2020 05:26 CET | Update | https://www.mdpi.com/2227-7390/4/1/13 |
| article html file updated | 21 September 2019 12:31 CEST | Update | - |
| article html file updated | 5 May 2019 22:28 CEST | Update | - |
| article html file updated | 26 March 2019 22:32 CET | Update | - |
| article html file updated | 29 March 2016 07:21 CEST | Original file | - |
| article pdf uploaded. | 4 March 2016 09:16 CET | Version of Record | https://www.mdpi.com/2227-7390/4/1/13/pdf |
| article xml uploaded. | 4 March 2016 09:16 CET | Original file | https://www.mdpi.com/2227-7390/4/1/13/xml |
