| article html file updated | 7 February 2020 20:27 CET | Update | https://www.mdpi.com/2079-6412/7/1/4 |
| article html file updated | 22 September 2019 16:02 CEST | Update | N/A |
| article html file updated | 4 May 2019 17:31 CEST | Update | N/A |
| article html file updated | 7 February 2017 04:37 CET | Update | N/A |
| article html file updated | 28 December 2016 11:41 CET | Original file | N/A |
| article xml uploaded. | 28 December 2016 11:38 CET | Original file | https://www.mdpi.com/2079-6412/7/1/4/xml |
| article pdf uploaded. | 28 December 2016 11:38 CET | Version of Record | https://www.mdpi.com/2079-6412/7/1/4/pdf |
