| article html file updated | 7 February 2020 12:49 CET | Update | https://www.mdpi.com/2313-7673/1/1/4 |
| article html file updated | 5 May 2019 08:01 CEST | Update | N/A |
| article html file updated | 27 March 2019 12:36 CET | Update | N/A |
| article html file updated | 10 November 2017 04:42 CET | Update | N/A |
| article html file updated | 5 August 2016 06:56 CEST | Original file | N/A |
| article pdf uploaded. | 4 August 2016 15:58 CEST | Version of Record | https://www.mdpi.com/2313-7673/1/1/4/pdf |
