| article html file updated | 6 February 2020 07:43 CET | Update | https://www.mdpi.com/2077-0375/4/1/123 |
| article html file updated | 7 May 2019 17:43 CEST | Update | N/A |
| article html file updated | 21 March 2019 13:26 CET | Update | N/A |
| article html file updated | 19 August 2015 22:44 CEST | Update | N/A |
| article html file updated | 28 April 2014 10:55 CEST | Original file | N/A |
| article xml file uploaded | 28 April 2014 10:55 CEST | Original file | https://www.mdpi.com/2077-0375/4/1/123/xml |
| article pdf uploaded. | 5 March 2014 15:32 CET | Version of Record | https://www.mdpi.com/2077-0375/4/1/123/pdf |
