| article html file updated | 7 February 2020 23:53 CET | Update | https://www.mdpi.com/1424-2818/9/1/12 |
| article html file updated | 23 September 2019 10:43 CEST | Update | - |
| article html file updated | 4 May 2019 10:15 CEST | Update | - |
| article html file updated | 29 March 2017 10:35 CEST | Update | - |
| article html file updated | 23 February 2017 04:26 CET | Original file | - |
| article xml uploaded. | 23 February 2017 04:25 CET | Original file | https://www.mdpi.com/1424-2818/9/1/12/xml |
| article pdf uploaded. | 23 February 2017 04:25 CET | Updated version of record | https://www.mdpi.com/1424-2818/9/1/12/pdf |
| article pdf uploaded. | 21 February 2017 10:48 CET | Version of Record | https://www.mdpi.com/1424-2818/9/1/12/pdf-vor |
