| article html file updated | 7 February 2020 02:45 CET | Update | https://www.mdpi.com/1420-3049/21/1/28 |
| article html file updated | 21 September 2019 08:43 CEST | Update | - |
| article html file updated | 6 May 2019 03:51 CEST | Update | - |
| article html file updated | 26 March 2019 17:19 CET | Update | - |
| article html file updated | 12 November 2018 04:04 CET | Original file | - |
| article pdf uploaded. | 25 December 2015 10:56 CET | Version of Record | https://www.mdpi.com/1420-3049/21/1/28/pdf |
| article xml uploaded. | 25 December 2015 10:56 CET | Original file | https://www.mdpi.com/1420-3049/21/1/28/xml |
