| article html file updated | 6 February 2020 18:18 CET | Update | https://www.mdpi.com/1999-4907/6/5/1557 |
| article html file updated | 6 May 2019 20:41 CEST | Update | - |
| article html file updated | 26 March 2019 01:56 CET | Update | - |
| article html file updated | 21 August 2015 11:35 CEST | Update | - |
| article html file updated | 9 June 2015 12:07 CEST | Update | - |
| article xml file uploaded | 9 June 2015 12:07 CEST | Update | https://www.mdpi.com/1999-4907/6/5/1557/xml |
| article html file updated | 3 June 2015 11:45 CEST | Original file | - |
| article xml file uploaded | 3 June 2015 11:45 CEST | Original file | - |
| article pdf uploaded. | 5 May 2015 09:52 CEST | Version of Record | https://www.mdpi.com/1999-4907/6/5/1557/pdf |
