| article html file updated | 6 February 2020 17:57 CET | Update | https://www.mdpi.com/1999-4893/8/2/157 |
| article html file updated | 6 May 2019 21:22 CEST | Update | - |
| article html file updated | 26 March 2019 01:13 CET | Update | - |
| article html file updated | 21 August 2015 11:01 CEST | Update | - |
| article html file updated | 15 July 2015 09:22 CEST | Original file | - |
| article xml file uploaded | 15 July 2015 09:22 CEST | Original file | https://www.mdpi.com/1999-4893/8/2/157/xml |
| article pdf uploaded. | 23 April 2015 10:03 CEST | Version of Record | https://www.mdpi.com/1999-4893/8/2/157/pdf |
