| article html file updated | 7 February 2020 17:00 CET | Update | https://www.mdpi.com/2076-3425/6/4/51 |
| article html file updated | 22 September 2019 03:57 CEST | Update | N/A |
| article html file updated | 5 May 2019 00:26 CEST | Update | N/A |
| article html file updated | 27 December 2016 02:17 CET | Update | N/A |
| article html file updated | 26 October 2016 10:22 CEST | Original file | N/A |
| article xml uploaded. | 26 October 2016 10:20 CEST | Update | https://www.mdpi.com/2076-3425/6/4/51/xml |
| article xml uploaded. | 26 October 2016 10:20 CEST | Update | N/A |
| article xml uploaded. | 26 October 2016 10:20 CEST | Original file | N/A |
| article pdf uploaded. | 26 October 2016 10:20 CEST | Version of Record | https://www.mdpi.com/2076-3425/6/4/51/pdf |
