| article html file updated | 9 February 2020 15:02 CET | Update | https://www.mdpi.com/2079-9721/6/2/30 |
| article html file updated | 2 October 2019 22:00 CEST | Update | - |
| article html file updated | 1 May 2019 01:07 CEST | Update | - |
| article html file updated | 17 April 2019 01:44 CEST | Update | - |
| article html file updated | 29 March 2019 18:31 CET | Update | - |
| article html file updated | 24 April 2018 08:56 CEST | Original file | - |
| article pdf uploaded. | 24 April 2018 08:54 CEST | Version of Record | https://www.mdpi.com/2079-9721/6/2/30/pdf |
| article xml uploaded. | 24 April 2018 08:54 CEST | Update | https://www.mdpi.com/2079-9721/6/2/30/xml |
| article xml file uploaded | 24 April 2018 08:54 CEST | Original file | - |
