| article html file updated | 7 February 2020 14:21 CET | Update | https://www.mdpi.com/2227-7080/4/3/28 |
| article html file updated | 22 September 2019 00:13 CEST | Update | - |
| article html file updated | 5 May 2019 05:15 CEST | Update | - |
| article html file updated | 27 March 2019 15:50 CET | Update | - |
| article html file updated | 2 September 2016 09:50 CEST | Original file | - |
| article xml uploaded. | 2 September 2016 09:49 CEST | Original file | https://www.mdpi.com/2227-7080/4/3/28/xml |
| article pdf uploaded. | 2 September 2016 09:49 CEST | Version of Record | https://www.mdpi.com/2227-7080/4/3/28/pdf |
