| article html file updated | 7 February 2020 06:34 CET | Update | https://www.mdpi.com/1420-3049/21/4/428 |
| article html file updated | 21 September 2019 14:11 CEST | Update | - |
| article html file updated | 5 May 2019 20:05 CEST | Update | - |
| article html file updated | 27 March 2019 00:36 CET | Update | - |
| article html file updated | 17 September 2018 03:44 CEST | Update | - |
| article html file updated | 28 April 2016 11:33 CEST | Update | - |
| article html file updated | 29 March 2016 12:12 CEST | Original file | - |
| article xml uploaded. | 29 March 2016 12:11 CEST | Original file | https://www.mdpi.com/1420-3049/21/4/428/xml |
| article pdf uploaded. | 29 March 2016 12:11 CEST | Version of Record | https://www.mdpi.com/1420-3049/21/4/428/pdf |
