| article html file updated | 7 February 2020 16:53 CET | Update | https://www.mdpi.com/2077-0472/6/4/55 |
| article html file updated | 22 September 2019 03:47 CEST | Update | - |
| article html file updated | 5 May 2019 00:40 CEST | Update | - |
| article html file updated | 28 December 2016 05:18 CET | Update | - |
| article html file updated | 24 October 2016 11:52 CEST | Original file | - |
| article xml uploaded. | 24 October 2016 11:51 CEST | Original file | https://www.mdpi.com/2077-0472/6/4/55/xml |
| article pdf uploaded. | 24 October 2016 11:51 CEST | Version of Record | https://www.mdpi.com/2077-0472/6/4/55/pdf |
