| article html file updated | 8 February 2020 20:19 CET | Update | https://www.mdpi.com/2305-6304/5/4/31 |
| article html file updated | 28 September 2019 05:39 CEST | Update | - |
| article html file updated | 2 May 2019 17:00 CEST | Update | - |
| article html file updated | 3 January 2018 09:09 CET | Update | - |
| article html file updated | 4 November 2017 09:01 CET | Original file | - |
| article xml uploaded. | 4 November 2017 09:00 CET | Original file | https://www.mdpi.com/2305-6304/5/4/31/xml |
| article pdf uploaded. | 4 November 2017 09:00 CET | Version of Record | https://www.mdpi.com/2305-6304/5/4/31/pdf |
