| article html file updated | 6 February 2020 20:31 CET | Update | https://www.mdpi.com/2073-4468/4/3/157 |
| article html file updated | 6 May 2019 16:04 CEST | Update | - |
| article html file updated | 26 March 2019 06:18 CET | Update | - |
| article html file updated | 14 October 2015 09:49 CEST | Original file | - |
| article xml file uploaded | 14 October 2015 09:49 CEST | Original file | https://www.mdpi.com/2073-4468/4/3/157/xml |
| article pdf uploaded. | 10 July 2015 09:47 CEST | Version of Record | https://www.mdpi.com/2073-4468/4/3/157/pdf |
