| article html file updated | 8 February 2020 06:12 CET | Update | https://www.mdpi.com/2076-0760/6/2/51 |
| article html file updated | 24 September 2019 21:43 CEST | Update | N/A |
| article html file updated | 3 May 2019 21:23 CEST | Update | N/A |
| article html file updated | 22 May 2017 04:46 CEST | Update | N/A |
| article html file updated | 18 May 2017 15:26 CEST | Original file | N/A |
| article xml uploaded. | 18 May 2017 15:25 CEST | Original file | https://www.mdpi.com/2076-0760/6/2/51/xml |
| article pdf uploaded. | 18 May 2017 15:25 CEST | Version of Record | https://www.mdpi.com/2076-0760/6/2/51/pdf |
