| article html file updated | 7 February 2020 16:58 CET | Update | https://www.mdpi.com/2218-6581/5/4/22 |
| article html file updated | 22 September 2019 03:54 CEST | Update | - |
| article html file updated | 5 May 2019 00:29 CEST | Update | - |
| article html file updated | 30 December 2016 06:04 CET | Update | - |
| article html file updated | 26 October 2016 07:30 CEST | Original file | - |
| article xml uploaded. | 26 October 2016 07:29 CEST | Update | https://www.mdpi.com/2218-6581/5/4/22/xml |
| article xml uploaded. | 26 October 2016 07:29 CEST | Original file | - |
| article pdf uploaded. | 26 October 2016 07:29 CEST | Version of Record | https://www.mdpi.com/2218-6581/5/4/22/pdf |
