| article html file updated | 8 February 2020 07:16 CET | Update | https://www.mdpi.com/1999-4923/9/2/20 |
| article html file updated | 25 September 2019 03:12 CEST | Update | N/A |
| article html file updated | 3 May 2019 19:21 CEST | Update | N/A |
| article html file updated | 29 June 2017 12:45 CEST | Update | N/A |
| article html file updated | 5 June 2017 05:09 CEST | Original file | N/A |
| article xml uploaded. | 5 June 2017 05:08 CEST | Update | https://www.mdpi.com/1999-4923/9/2/20/xml |
| article pdf uploaded. | 5 June 2017 05:08 CEST | Updated version of record | https://www.mdpi.com/1999-4923/9/2/20/pdf |
| article pdf uploaded. | 2 June 2017 10:39 CEST | Version of Record | https://www.mdpi.com/1999-4923/9/2/20/pdf-vor |
