| article html file updated | 7 February 2020 16:47 CET | Update | https://www.mdpi.com/2076-3921/5/4/38 |
| article html file updated | 22 September 2019 03:40 CEST | Update | - |
| article html file updated | 5 May 2019 00:52 CEST | Update | - |
| article html file updated | 27 December 2016 11:55 CET | Update | - |
| article html file updated | 21 October 2016 11:40 CEST | Original file | - |
| article xml uploaded. | 21 October 2016 11:39 CEST | Original file | https://www.mdpi.com/2076-3921/5/4/38/xml |
| article pdf uploaded. | 21 October 2016 11:39 CEST | Version of Record | https://www.mdpi.com/2076-3921/5/4/38/pdf |
