| article html file updated | 7 February 2020 07:02 CET | Update | https://www.mdpi.com/1424-8220/16/4/503 |
| article html file updated | 5 May 2019 19:07 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:26 CET | Update | N/A |
| article html file updated | 29 April 2016 04:46 CEST | Update | N/A |
| article html file updated | 8 April 2016 14:20 CEST | Original file | N/A |
| article xml uploaded. | 8 April 2016 14:19 CEST | Original file | https://www.mdpi.com/1424-8220/16/4/503/xml |
| article pdf uploaded. | 8 April 2016 14:19 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/4/503/pdf |
