| article html file updated | 7 February 2020 07:33 CET | Update | https://www.mdpi.com/1420-3049/21/4/506 |
| article html file updated | 21 September 2019 15:36 CEST | Update | - |
| article html file updated | 5 May 2019 18:03 CEST | Update | - |
| article html file updated | 27 March 2019 02:28 CET | Update | - |
| article html file updated | 17 September 2018 04:09 CEST | Update | - |
| article html file updated | 28 April 2016 12:00 CEST | Update | - |
| article html file updated | 20 April 2016 14:41 CEST | Original file | - |
| article xml uploaded. | 20 April 2016 14:39 CEST | Original file | https://www.mdpi.com/1420-3049/21/4/506/xml |
| article pdf uploaded. | 20 April 2016 14:39 CEST | Version of Record | https://www.mdpi.com/1420-3049/21/4/506/pdf |
