| article html file updated | 7 February 2020 18:49 CET | Update | https://www.mdpi.com/1424-8247/9/4/75 |
| article html file updated | 22 September 2019 07:44 CEST | Update | - |
| article html file updated | 4 May 2019 20:56 CEST | Update | - |
| article html file updated | 27 October 2017 10:45 CEST | Update | - |
| article html file updated | 29 December 2016 11:51 CET | Update | - |
| article html file updated | 30 November 2016 07:06 CET | Update | - |
| article html file updated | 30 November 2016 07:05 CET | Original file | - |
| article xml uploaded. | 30 November 2016 07:05 CET | Update | https://www.mdpi.com/1424-8247/9/4/75/xml |
| article pdf uploaded. | 30 November 2016 07:05 CET | Updated version of record | https://www.mdpi.com/1424-8247/9/4/75/pdf |
| article xml uploaded. | 30 November 2016 07:04 CET | Original file | - |
| article pdf uploaded. | 30 November 2016 07:04 CET | Version of Record | - |
