| article html file updated | 7 February 2020 03:44 CET | Update | https://www.mdpi.com/1424-8247/9/1/5 |
| article html file updated | 6 May 2019 02:00 CEST | Update | - |
| article html file updated | 26 March 2019 19:03 CET | Update | - |
| article html file updated | 27 October 2017 10:46 CEST | Update | - |
| article html file updated | 30 March 2016 12:07 CEST | Original file | - |
| article pdf uploaded. | 22 January 2016 14:37 CET | Updated version of record | https://www.mdpi.com/1424-8247/9/1/5/pdf |
| article pdf uploaded. | 21 January 2016 12:14 CET | Version of Record | https://www.mdpi.com/1424-8247/9/1/5/pdf-vor |
| article xml uploaded. | 21 January 2016 12:14 CET | Original file | https://www.mdpi.com/1424-8247/9/1/5/xml |
