| article html file updated | 6 February 2020 23:16 CET | Update | https://www.mdpi.com/2077-0375/5/4/495 |
| article html file updated | 6 May 2019 10:22 CEST | Update | N/A |
| article html file updated | 26 March 2019 11:39 CET | Update | N/A |
| article html file updated | 28 October 2015 05:32 CET | Original file | N/A |
| article xml file uploaded | 28 October 2015 05:32 CET | Original file | https://www.mdpi.com/2077-0375/5/4/495/xml |
| article pdf uploaded. | 2 October 2015 15:34 CEST | Updated version of record | https://www.mdpi.com/2077-0375/5/4/495/pdf |
| article pdf uploaded. | 25 September 2015 16:41 CEST | Version of Record | https://www.mdpi.com/2077-0375/5/4/495/pdf-vor |
