| article html file updated | 8 February 2020 18:25 CET | Update | https://www.mdpi.com/2075-4450/8/4/109 |
| article html file updated | 27 September 2019 18:14 CEST | Update | - |
| article html file updated | 2 May 2019 21:21 CEST | Update | - |
| article html file updated | 2 January 2018 12:40 CET | Update | - |
| article html file updated | 13 October 2017 15:36 CEST | Original file | - |
| article xml uploaded. | 13 October 2017 15:35 CEST | Original file | https://www.mdpi.com/2075-4450/8/4/109/xml |
| article pdf uploaded. | 13 October 2017 15:35 CEST | Version of Record | https://www.mdpi.com/2075-4450/8/4/109/pdf |
