| article html file updated | 6 February 2020 07:54 CET | Update | https://www.mdpi.com/2079-6374/4/1/63 |
| article html file updated | 7 May 2019 17:19 CEST | Update | - |
| article html file updated | 21 March 2019 13:52 CET | Update | - |
| article html file updated | 19 August 2015 23:43 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/2079-6374/4/1/63/xml |
| article pdf uploaded. | 14 March 2014 09:37 CET | Version of Record | https://www.mdpi.com/2079-6374/4/1/63/pdf |
