| article html file updated | 7 February 2020 06:25 CET | Update | https://www.mdpi.com/1420-3049/21/4/404 |
| article html file updated | 21 September 2019 13:56 CEST | Update | - |
| article html file updated | 5 May 2019 20:24 CEST | Update | - |
| article html file updated | 27 March 2019 00:21 CET | Update | - |
| article html file updated | 17 September 2018 03:38 CEST | Update | - |
| article html file updated | 28 April 2016 11:25 CEST | Update | - |
| article html file updated | 25 March 2016 10:16 CET | Original file | - |
| article xml uploaded. | 25 March 2016 10:15 CET | Original file | https://www.mdpi.com/1420-3049/21/4/404/xml |
| article pdf uploaded. | 25 March 2016 10:15 CET | Version of Record | https://www.mdpi.com/1420-3049/21/4/404/pdf |
