| article html file updated | 8 February 2020 02:08 CET | Update | https://www.mdpi.com/1424-8220/17/4/661 |
| article html file updated | 23 September 2019 23:41 CEST | Update | N/A |
| article html file updated | 4 May 2019 05:16 CEST | Update | N/A |
| article html file updated | 29 April 2017 13:26 CEST | Update | N/A |
| article html file updated | 27 March 2017 05:29 CEST | Update | N/A |
| article html file updated | 26 March 2017 22:25 CEST | Update | N/A |
| article html file updated | 25 March 2017 22:25 CET | Update | N/A |
| article html file updated | 25 March 2017 06:40 CET | Original file | N/A |
| article xml uploaded. | 25 March 2017 06:39 CET | Original file | https://www.mdpi.com/1424-8220/17/4/661/xml |
| article pdf uploaded. | 25 March 2017 06:39 CET | Updated version of record | https://www.mdpi.com/1424-8220/17/4/661/pdf |
| article pdf uploaded. | 23 March 2017 13:15 CET | Version of Record | https://www.mdpi.com/1424-8220/17/4/661/pdf-vor |