| article html file updated | 7 February 2020 07:25 CET | Update | https://www.mdpi.com/2227-7080/4/2/12 |
| article html file updated | 5 May 2019 18:19 CEST | Update | - |
| article html file updated | 27 March 2019 02:11 CET | Update | - |
| article html file updated | 22 July 2016 09:25 CEST | Update | - |
| article xml uploaded. | 22 July 2016 09:24 CEST | Update | https://www.mdpi.com/2227-7080/4/2/12/xml |
| article pdf uploaded. | 22 July 2016 09:24 CEST | Updated version of record | https://www.mdpi.com/2227-7080/4/2/12/pdf |
| article html file updated | 18 April 2016 12:14 CEST | Original file | - |
