| article html file updated | 7 February 2020 12:26 CET | Update | https://www.mdpi.com/2227-9709/3/3/12 |
| article html file updated | 21 September 2019 21:53 CEST | Update | - |
| article html file updated | 5 May 2019 08:48 CEST | Update | - |
| article html file updated | 27 March 2019 11:39 CET | Update | - |
| article html file updated | 27 October 2017 10:22 CEST | Update | - |
| article html file updated | 28 July 2016 10:39 CEST | Original file | - |
| article xml uploaded. | 28 July 2016 10:25 CEST | Original file | https://www.mdpi.com/2227-9709/3/3/12/xml |
| article pdf uploaded. | 28 July 2016 10:25 CEST | Version of Record | https://www.mdpi.com/2227-9709/3/3/12/pdf |
