| article html file updated | 12 February 2020 14:14 CET | Update | https://www.mdpi.com/2413-8851/3/2/56 |
| article html file updated | 23 May 2019 11:43 CEST | Update | N/A |
| article html file updated | 22 May 2019 09:23 CEST | Original file | N/A |
| article pdf uploaded. | 22 May 2019 09:22 CEST | Version of Record | https://www.mdpi.com/2413-8851/3/2/56/pdf |
| article xml uploaded. | 22 May 2019 09:22 CEST | Update | https://www.mdpi.com/2413-8851/3/2/56/xml |
| article xml file uploaded | 22 May 2019 09:22 CEST | Original file | N/A |
