| article html file updated | 7 February 2020 09:21 CET | Update | https://www.mdpi.com/2075-1729/6/2/22 |
| article html file updated | 5 May 2019 14:34 CEST | Update | - |
| article html file updated | 27 March 2019 05:52 CET | Update | - |
| article html file updated | 4 July 2016 10:34 CEST | Update | - |
| article html file updated | 26 May 2016 13:28 CEST | Original file | - |
| article xml uploaded. | 26 May 2016 12:33 CEST | Original file | https://www.mdpi.com/2075-1729/6/2/22/xml |
| article pdf uploaded. | 26 May 2016 12:33 CEST | Version of Record | https://www.mdpi.com/2075-1729/6/2/22/pdf |
