| article html file updated | 12 February 2020 10:46 CET | Update | https://www.mdpi.com/2227-9709/6/2/21 |
| article html file updated | 19 October 2019 18:03 CEST | Update | N/A |
| article html file updated | 5 July 2019 06:24 CEST | Update | N/A |
| article html file updated | 8 May 2019 14:49 CEST | Original file | N/A |
| article pdf uploaded. | 8 May 2019 12:36 CEST | Version of Record | https://www.mdpi.com/2227-9709/6/2/21/pdf |
| article xml uploaded. | 8 May 2019 12:36 CEST | Update | https://www.mdpi.com/2227-9709/6/2/21/xml |
| article xml file uploaded | 8 May 2019 12:36 CEST | Original file | N/A |
