| article html file updated | 7 February 2020 19:17 CET | Update | https://www.mdpi.com/2079-6412/6/4/68 |
| article html file updated | 22 September 2019 09:38 CEST | Update | N/A |
| article html file updated | 4 May 2019 19:56 CEST | Update | N/A |
| article html file updated | 28 December 2016 08:37 CET | Update | N/A |
| article html file updated | 8 December 2016 11:53 CET | Original file | N/A |
| article xml uploaded. | 8 December 2016 11:52 CET | Original file | https://www.mdpi.com/2079-6412/6/4/68/xml |
| article pdf uploaded. | 8 December 2016 11:52 CET | Version of Record | https://www.mdpi.com/2079-6412/6/4/68/pdf |
