| article html file updated | 6 February 2020 17:18 CET | Update | https://www.mdpi.com/2072-666X/6/4/423 |
| article html file updated | 6 May 2019 22:36 CEST | Update | - |
| article html file updated | 26 March 2019 00:04 CET | Update | - |
| article html file updated | 21 August 2015 09:56 CEST | Update | - |
| article html file updated | 30 April 2015 11:43 CEST | Original file | - |
| article xml file uploaded | 30 April 2015 11:43 CEST | Original file | https://www.mdpi.com/2072-666X/6/4/423/xml |
| article pdf uploaded. | 13 April 2015 17:12 CEST | Updated version of record | https://www.mdpi.com/2072-666X/6/4/423/pdf |
| article pdf uploaded. | 3 April 2015 09:52 CEST | Version of Record | https://www.mdpi.com/2072-666X/6/4/423/pdf-vor |
