| article html file updated | 6 February 2020 02:13 CET | Update | https://www.mdpi.com/1999-4893/6/2/319 |
| article html file updated | 19 September 2019 20:59 CEST | Update | - |
| article html file updated | 8 May 2019 04:56 CEST | Update | - |
| article html file updated | 20 March 2019 22:48 CET | Update | - |
| article html file updated | 28 July 2017 06:19 CEST | Original file | - |
| article xml uploaded. | 28 July 2017 06:17 CEST | Update | https://www.mdpi.com/1999-4893/6/2/319/xml |
| article pdf uploaded. | 21 May 2013 18:30 CEST | Version of Record | https://www.mdpi.com/1999-4893/6/2/319/pdf |
