| article html file updated | 7 February 2020 06:30 CET | Update | https://www.mdpi.com/1420-3049/21/4/424 |
| article html file updated | 21 September 2019 14:04 CEST | Update | N/A |
| article html file updated | 5 May 2019 20:14 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:29 CET | Update | N/A |
| article html file updated | 17 September 2018 03:44 CEST | Update | N/A |
| article html file updated | 28 April 2016 11:31 CEST | Update | N/A |
| article html file updated | 28 March 2016 11:35 CEST | Original file | N/A |
| article xml uploaded. | 28 March 2016 11:32 CEST | Original file | https://www.mdpi.com/1420-3049/21/4/424/xml |
| article pdf uploaded. | 28 March 2016 11:32 CEST | Version of Record | https://www.mdpi.com/1420-3049/21/4/424/pdf |
