| article html file updated | 6 February 2020 16:28 CET | Update | https://www.mdpi.com/2218-6581/4/1/50 |
| article html file updated | 7 May 2019 00:03 CEST | Update | - |
| article html file updated | 25 March 2019 22:43 CET | Update | - |
| article html file updated | 6 November 2015 11:08 CET | Original file | - |
| article xml file uploaded | 6 November 2015 11:08 CET | Original file | https://www.mdpi.com/2218-6581/4/1/50/xml |
| article pdf uploaded. | 10 March 2015 13:43 CET | Version of Record | https://www.mdpi.com/2218-6581/4/1/50/pdf |
