| article html file updated | 7 February 2020 08:33 CET | Update | https://www.mdpi.com/2075-1729/6/2/19 |
| article html file updated | 5 May 2019 16:05 CEST | Update | - |
| article html file updated | 27 March 2019 04:25 CET | Update | - |
| article html file updated | 4 July 2016 10:33 CEST | Update | - |
| article html file updated | 12 May 2016 09:00 CEST | Original file | - |
| article xml uploaded. | 12 May 2016 08:59 CEST | Original file | https://www.mdpi.com/2075-1729/6/2/19/xml |
| article pdf uploaded. | 12 May 2016 08:59 CEST | Version of Record | https://www.mdpi.com/2075-1729/6/2/19/pdf |
