| article html file updated | 6 February 2020 15:11 CET | Update | https://www.mdpi.com/2079-4983/6/1/33 |
| article html file updated | 20 September 2019 16:58 CEST | Update | - |
| article html file updated | 7 May 2019 02:27 CEST | Update | - |
| article html file updated | 25 March 2019 20:31 CET | Update | - |
| article html file updated | 11 December 2018 09:32 CET | Update | - |
| article html file updated | 11 December 2018 09:22 CET | Update | - |
| article html file updated | 11 December 2018 09:18 CET | Update | - |
| article html file updated | 11 December 2018 09:12 CET | Update | - |
| article html file updated | 11 December 2018 08:17 CET | Update | - |
| article html file updated | 21 August 2015 05:52 CEST | Update | - |
| article html file updated | 3 April 2015 12:07 CEST | Original file | - |
| article xml file uploaded | 3 April 2015 12:07 CEST | Original file | https://www.mdpi.com/2079-4983/6/1/33/xml |
| article pdf uploaded. | 14 January 2015 15:10 CET | Version of Record | https://www.mdpi.com/2079-4983/6/1/33/pdf |
