| article html file updated | 6 February 2020 07:33 CET | Update | https://www.mdpi.com/2079-6374/4/1/18 |
| article html file updated | 7 May 2019 18:03 CEST | Update | - |
| article html file updated | 21 March 2019 13:02 CET | Update | - |
| article html file updated | 19 August 2015 21:52 CEST | Update | - |
| article html file updated | 26 August 2014 04:00 CEST | Original file | - |
| article xml file uploaded | 26 August 2014 04:00 CEST | Original file | https://www.mdpi.com/2079-6374/4/1/18/xml |
| article pdf uploaded. | 27 February 2014 08:35 CET | Version of Record | https://www.mdpi.com/2079-6374/4/1/18/pdf |
