| article html file updated | 7 February 2020 06:56 CET | Update | https://www.mdpi.com/1424-8220/16/4/491 |
| article html file updated | 5 May 2019 19:21 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:15 CET | Update | N/A |
| article html file updated | 29 April 2016 04:39 CEST | Update | N/A |
| article html file updated | 7 April 2016 11:04 CEST | Original file | N/A |
| article xml uploaded. | 7 April 2016 11:03 CEST | Original file | https://www.mdpi.com/1424-8220/16/4/491/xml |
| article pdf uploaded. | 7 April 2016 11:03 CEST | Version of Record | https://www.mdpi.com/1424-8220/16/4/491/pdf |
