| article html file updated | 6 February 2020 16:47 CET | Update | https://www.mdpi.com/1999-4907/6/3/809 |
| article html file updated | 6 May 2019 23:28 CEST | Update | - |
| article html file updated | 25 March 2019 23:14 CET | Update | - |
| article html file updated | 21 August 2015 09:02 CEST | Update | - |
| article html file updated | 23 March 2015 07:42 CET | Original file | - |
| article xml file uploaded | 23 March 2015 07:42 CET | Original file | https://www.mdpi.com/1999-4907/6/3/809/xml |
| article pdf uploaded. | 20 March 2015 13:25 CET | Updated version of record | https://www.mdpi.com/1999-4907/6/3/809/pdf |
| article pdf uploaded. | 19 March 2015 13:28 CET | Version of Record | https://www.mdpi.com/1999-4907/6/3/809/pdf-vor |
