| article html file updated | 6 February 2020 17:11 CET | Update | https://www.mdpi.com/1999-4907/6/4/957 |
| article html file updated | 6 May 2019 22:46 CEST | Update | - |
| article html file updated | 25 March 2019 23:54 CET | Update | - |
| article html file updated | 21 August 2015 09:45 CEST | Update | - |
| article html file updated | 21 April 2015 12:28 CEST | Update | - |
| article xml file uploaded | 21 April 2015 12:28 CEST | Update | https://www.mdpi.com/1999-4907/6/4/957/xml |
| article html file updated | 7 April 2015 05:36 CEST | Original file | - |
| article xml file uploaded | 7 April 2015 05:36 CEST | Original file | - |
| article pdf uploaded. | 2 April 2015 08:43 CEST | Updated version of record | https://www.mdpi.com/1999-4907/6/4/957/pdf |
| article pdf uploaded. | 31 March 2015 16:03 CEST | Version of Record | https://www.mdpi.com/1999-4907/6/4/957/pdf-vor |
