| article html file updated | 9 February 2020 18:11 CET | Update | https://www.mdpi.com/2079-9721/6/2/39 |
| article html file updated | 30 April 2019 18:36 CEST | Update | N/A |
| article html file updated | 16 April 2019 19:02 CEST | Update | N/A |
| article html file updated | 30 March 2019 02:18 CET | Update | N/A |
| article html file updated | 18 May 2018 13:11 CEST | Original file | N/A |
| article pdf uploaded. | 18 May 2018 13:10 CEST | Version of Record | https://www.mdpi.com/2079-9721/6/2/39/pdf |
| article xml uploaded. | 18 May 2018 13:10 CEST | Update | https://www.mdpi.com/2079-9721/6/2/39/xml |
| article xml file uploaded | 18 May 2018 13:10 CEST | Original file | N/A |
