| article html file updated | 9 February 2020 13:26 CET | Update | https://www.mdpi.com/1999-4907/9/4/201 |
| article html file updated | 2 October 2019 12:30 CEST | Update | N/A |
| article html file updated | 1 May 2019 04:16 CEST | Update | N/A |
| article html file updated | 17 April 2019 04:34 CEST | Update | N/A |
| article html file updated | 29 March 2019 14:47 CET | Update | N/A |
| article html file updated | 1 May 2018 11:34 CEST | Update | N/A |
| article html file updated | 11 April 2018 16:27 CEST | Original file | N/A |
| article xml uploaded. | 11 April 2018 16:26 CEST | Update | https://www.mdpi.com/1999-4907/9/4/201/xml |
| article pdf uploaded. | 11 April 2018 16:26 CEST | Version of Record | https://www.mdpi.com/1999-4907/9/4/201/pdf |
